1using System;
2using System.Collections;
3using System.Collections.Specialized;
4using System.Data;
5using System.Data.SqlClient;
6using System.Configuration;
7
8namespace SQLServerDAL //可以修改成实际项目的命名空间名称
9{
10 /**//**//**//// <summary>
11 /// Copyright (C) 2004-2008 LiTianPing
12 /// 数据访问基础类(基于SQLServer)
13 /// 用户可以修改满足自己项目的需要。
14 /// </summary>
15 public abstract class DbHelperSQL
16 {
17 //数据库连接字符串(web.config来配置)
18 //<add key="ConnectionString" value="server=127.0.0.1;database=DATABASE;uid=sa;pwd=" />
19 protected static string connectionString = ConfigurationSettings.AppSettings["ConnectionString"];
20 public DbHelperSQL()
21 {
22 }
23
24 公用方法公用方法#region 公用方法
25
26 public static int GetMaxID(string FieldName,string TableName)
27 {
28 string strsql = "select max(" + FieldName + ")+1 from " + TableName;
29 object obj = GetSingle(strsql);
30 if (obj == null)
31 {
32 return 1;
33 }
34 else
35 {
36 return int.Parse(obj.ToString());
37 }
38 }
39 public static bool Exists(string strSql, params SqlParameter[] cmdParms)
40 {
41 object obj = GetSingle(strSql, cmdParms);
42 int cmdresult;
43 if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
44 {
45 cmdresult = 0;
46 }
47 else
48 {
49 cmdresult = int.Parse(obj.ToString());
50 }
51 if (cmdresult == 0)
52 {
53 return false;
54 }
55 else
56 {
57 return true;
58 }
59 }
60 #endregion
61
62 执行简单SQL语句执行简单SQL语句#region 执行简单SQL语句
63
64 /**//**//**//// <summary>
65 /// 执行SQL语句,返回影响的记录数
66 /// </summary>
67 /// <param name="SQLString">SQL语句</param>
68 /// <returns>影响的记录数</returns>
69 public static int ExecuteSql(string SQLString)
70 {
71 using (SqlConnection connection = new SqlConnection(connectionString))
72 {
73 using (SqlCommand cmd = new SqlCommand(SQLString,connection))
74 {
75 try
76 {
77 connection.Open();
78 int rows=cmd.ExecuteNonQuery();
79 return rows;
80 }
81 catch(System.Data.SqlClient.SqlException E)
82 {
83 connection.Close();
84 throw new Exception(E.Message);
85 }
86 }
87 }
88 }
89
90 /**//**//**//// <summary>
91 /// 执行多条SQL语句,实现数据库事务。
92 /// </summary>
93 /// <param name="SQLStringList">多条SQL语句</param>
94 public static void ExecuteSqlTran(ArrayList SQLStringList)
95 {
96 using (SqlConnection conn = new SqlConnection(connectionString))
97 {
98 conn.Open();
99 SqlCommand cmd = new SqlCommand();
100 cmd.Connection=conn;
101 SqlTransaction tx=conn.BeginTransaction();
102 cmd.Transaction=tx;
103 try
104 {
105 for(int n=0;n<SQLStringList.Count;n++)
106 {
107 string strsql=SQLStringList[n].ToString();
108 if (strsql.Trim().Length>1)
109 {
110 cmd.CommandText=strsql;
111 cmd.ExecuteNonQuery();
112 }
113 }
114 tx.Commit();
115 }
116 catch(System.Data.SqlClient.SqlException E)
117 {
118 tx.Rollback();
119 throw new Exception(E.Message);
120 }
121 }
122 }
123 /**//**//**//// <summary>
124 /// 执行带一个存储过程参数的的SQL语句。
125 /// </summary>
126 /// <param name="SQLString">SQL语句</param>
127 /// <param name="content">参数内容,比如一个字段是格式复杂的文章,有特殊符号,可以通过这个方式添加</param>
128 /// <returns>影响的记录数</returns>
129 public static int ExecuteSql(string SQLString,string content)
130 {
131 using (SqlConnection connection = new SqlConnection(connectionString))
132 {
133 SqlCommand cmd = new SqlCommand(SQLString,connection);
134 System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter ( "@content", SqlDbType.NText);
135 myParameter.Value = content ;
136 cmd.Parameters.Add(myParameter);
137 try
138 {
139 connection.Open();
140 int rows=cmd.ExecuteNonQuery();
141 return rows;
142 }
143 catch(System.Data.SqlClient.SqlException E)
144 {
145 throw new Exception(E.Message);
146 }
147 finally
148 {
149 cmd.Dispose();
150 connection.Close();
151 }
152 }
153 }
154 /**//**//**//// <summary>
155 /// 向数据库里插入图像格式的字段(和上面情况类似的另一种实例)
156 /// </summary>
157 /// <param name="strSQL">SQL语句</param>
158 /// <param name="fs">图像字节,数据库的字段类型为image的情况</param>
159 /// <returns>影响的记录数</returns>
160 public static int ExecuteSqlInsertImg(string strSQL,byte[] fs)
161 {
162 using (SqlConnection connection = new SqlConnection(connectionString))
163 {
164 SqlCommand cmd = new SqlCommand(strSQL,connection);
165 System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter ( "@fs", SqlDbType.Image);
166 myParameter.Value = fs ;
167 cmd.Parameters.Add(myParameter);
168 try
169 {
170 connection.Open();
171 int rows=cmd.ExecuteNonQuery();
172 return rows;
173 }
174 catch(System.Data.SqlClient.SqlException E)
175 {
176 throw new Exception(E.Message);
177 }
178 finally
179 {
180 cmd.Dispose();
181 connection.Close();
182 }
183 }
184 }
185
186 /**//**//**//// <summary>
187 /// 执行一条计算查询结果语句,返回查询结果(object)。
188 /// </summary>
189 /// <param name="SQLString">计算查询结果语句</param>
190 /// <returns>查询结果(object)</returns>
191 public static object GetSingle(string SQLString)
192 {
193 using (SqlConnection connection = new SqlConnection(connectionString))
194 {
195 using(SqlCommand cmd = new SqlCommand(SQLString,connection))
196 {
197 try
198 {
199 connection.Open();
200 object obj = cmd.ExecuteScalar();
201 if((Object.Equals(obj,null))||(Object.Equals(obj,System.DBNull.Value)))
202 {
203 return null;
204 }
205 else
206 {
207 return obj;
208 }
209 }
210 catch(System.Data.SqlClient.SqlException e)
211 {
212 connection.Close();
213 throw new Exception(e.Message);
214 }
215 }
216 }
217 }
218 /**//**//**//// <summary>
219 /// 执行查询语句,返回SqlDataReader
220 /// </summary>
221 /// <param name="strSQL">查询语句</param>
222 /// <returns>SqlDataReader</returns>
223 public static SqlDataReader ExecuteReader(string strSQL)
224 {
225 SqlConnection connection = new SqlConnection(connectionString);
226 SqlCommand cmd = new SqlCommand(strSQL,connection);
227 try
228 {
229 connection.Open();
230 SqlDataReader myReader = cmd.ExecuteReader();
231 return myReader;
232 }
233 catch(System.Data.SqlClient.SqlException e)
234 {
235 throw new Exception(e.Message);
236 }
237
238 }
239 /**//**//**//// <summary>
240 /// 执行查询语句,返回DataSet
241 /// </summary>
242 /// <param name="SQLString">查询语句</param>
243 /// <returns>DataSet</returns>
244 public static DataSet Query(string SQLString)
245 {
246 using (SqlConnection connection = new SqlConnection(connectionString))
247 {
248 DataSet ds = new DataSet();
249 try
250 {
251 connection.Open();
252 SqlDataAdapter command = new SqlDataAdapter(SQLString,connection);
253 command.Fill(ds,"ds");
254 }
255 catch(System.Data.SqlClient.SqlException ex)
256 {
257 throw new Exception(ex.Message);
258 }
259 return ds;
260 }
261 }
262
263
264 #endregion
265
266 执行带参数的SQL语句执行带参数的SQL语句#region 执行带参数的SQL语句
267
268 /**//**//**//// <summary>
269 /// 执行SQL语句,返回影响的记录数
270 /// </summary>
271 /// <param name="SQLString">SQL语句</param>
272 /// <returns>影响的记录数</returns>
273 public static int ExecuteSql(string SQLString,params SqlParameter[] cmdParms)
274 {
275 using (SqlConnection connection = new SqlConnection(connectionString))
276 {
277 using (SqlCommand cmd = new SqlCommand())
278 {
279 try
280 {
281 PrepareCommand(cmd, connection, null,SQLString, cmdParms);
282 int rows=cmd.ExecuteNonQuery();
283 cmd.Parameters.Clear();
284 return rows;
285 }
286 catch(System.Data.SqlClient.SqlException E)
287 {
288 throw new Exception(E.Message);
289 }
290 }
291 }
292 }
293
294
295 /**//**//**//// <summary>
296 /// 执行多条SQL语句,实现数据库事务。
297 /// </summary>
298 /// <param name="SQLStringList">SQL语句的哈希表(key为sql语句,value是该语句的SqlParameter[])</param>
299 public static void ExecuteSqlTran(Hashtable SQLStringList)
300 {
301 using (SqlConnection conn = new SqlConnection(connectionString))
302 {
303 conn.Open();
304 using (SqlTransaction trans = conn.BeginTransaction())
305 {
306 SqlCommand cmd = new SqlCommand();
307 try
308 {
309 //循环
310 foreach (DictionaryEntry myDE in SQLStringList)
311 {
312 string cmdText=myDE.Key.ToString();
313 SqlParameter[] cmdParms=(SqlParameter[])myDE.Value;
314 PrepareCommand(cmd,conn,trans,cmdText, cmdParms);
315 int val = cmd.ExecuteNonQuery();
316 cmd.Parameters.Clear();
317
318 trans.Commit();
319 }
320 }
321 catch
322 {
323 trans.Rollback();
324 throw;
325 }
326 }
327 }
328 }
329
330
331 /**//**//**//// <summary>
332 /// 执行一条计算查询结果语句,返回查询结果(object)。
333 /// </summary>
334 /// <param name="SQLString">计算查询结果语句</param>
335 /// <returns>查询结果(object)</returns>
336 public static object GetSingle(string SQLString,params SqlParameter[] cmdParms)
337 {
338 using (SqlConnection connection = new SqlConnection(connectionString))
339 {
340 using (SqlCommand cmd = new SqlCommand())
341 {
342 try
343 {
344 PrepareCommand(cmd, connection, null,SQLString, cmdParms);
345 object obj = cmd.ExecuteScalar();
346 cmd.Parameters.Clear();
347 if((Object.Equals(obj,null))||(Object.Equals(obj,System.DBNull.Value)))
348 {
349 return null;
350 }
351 else
352 {
353 return obj;
354 }
355 }
356 catch(System.Data.SqlClient.SqlException e)
357 {
358 throw new Exception(e.Message);
359 }
360 }
361 }
362 }
363
364 /**//**//**//// <summary>
365 /// 执行查询语句,返回SqlDataReader
366 /// </summary>
367 /// <param name="strSQL">查询语句</param>
368 /// <returns>SqlDataReader</returns>
369 public static SqlDataReader ExecuteReader(string SQLString,params SqlParameter[] cmdParms)
370 {
371 SqlConnection connection = new SqlConnection(connectionString);
372 SqlCommand cmd = new SqlCommand();
373 try
374 {
375 PrepareCommand(cmd, connection, null,SQLString, cmdParms);
376 SqlDataReader myReader = cmd.ExecuteReader();
377 cmd.Parameters.Clear();
378 return myReader;
379 }
380 catch(System.Data.SqlClient.SqlException e)
381 {
382 throw new Exception(e.Message);
383 }
384
385 }
386
387 /**//**//**//// <summary>
388 /// 执行查询语句,返回DataSet
389 /// </summary>
390 /// <param name="SQLString">查询语句</param>
391 /// <returns>DataSet</returns>
392 public static DataSet Query(string SQLString,params SqlParameter[] cmdParms)
393 {
394 using (SqlConnection connection = new SqlConnection(connectionString))
395 {
396 SqlCommand cmd = new SqlCommand();
397 PrepareCommand(cmd, connection, null,SQLString, cmdParms);
398 using( SqlDataAdapter da = new SqlDataAdapter(cmd) )
399 {
400 DataSet ds = new DataSet();
401 try
402 {
403 da.Fill(ds,"ds");
404 cmd.Parameters.Clear();
405 }
406 catch(System.Data.SqlClient.SqlException ex)
407 {
408 throw new Exception(ex.Message);
409 }
410 return ds;
411 }
412 }
413 }
414
415
416 private static void PrepareCommand(SqlCommand cmd,SqlConnection conn,SqlTransaction trans, string cmdText, SqlParameter[] cmdParms)
417 {
418 if (conn.State != ConnectionState.Open)
419 conn.Open();
420 cmd.Connection = conn;
421 cmd.CommandText = cmdText;
422 if (trans != null)
423 cmd.Transaction = trans;
424 cmd.CommandType = CommandType.Text;//cmdType;
425 if (cmdParms != null)
426 {
427 foreach (SqlParameter parm in cmdParms)
428 cmd.Parameters.Add(parm);
429 }
430 }
431
432 #endregion
433
434 存储过程操作存储过程操作#region 存储过程操作
435
436 /**//**//**//// <summary>
437 /// 执行存储过程
438 /// </summary>
439 /// <param name="storedProcName">存储过程名</param>
440 /// <param name="parameters">存储过程参数</param>
441 /// <returns>SqlDataReader</returns>
442 public static SqlDataReader RunProcedure(string storedProcName, IDataParameter[] parameters )
443 {
444 SqlConnection connection = new SqlConnection(connectionString);
445 SqlDataReader returnReader;
446 connection.Open();
447 SqlCommand command = BuildQueryCommand( connection,storedProcName, parameters );
448 command.CommandType = CommandType.StoredProcedure;
449 returnReader = command.ExecuteReader();
450 return returnReader;
451 }
452
453
454 /**//**//**//// <summary>
455 /// 执行存储过程
456 /// </summary>
457 /// <param name="storedProcName">存储过程名</param>
458 /// <param name="parameters">存储过程参数</param>
459 /// <param name="tableName">DataSet结果中的表名</param>
460 /// <returns>DataSet</returns>
461 public static DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName )
462 {
463 using (SqlConnection connection = new SqlConnection(connectionString))
464 {
465 DataSet dataSet = new DataSet();
466 connection.Open();
467 SqlDataAdapter sqlDA = new SqlDataAdapter();
468 sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters );
469 sqlDA.Fill( dataSet, tableName );
470 connection.Close();
471 return dataSet;
472 }
473 }
474
475
476 /**//**//**//// <summary>
477 /// 构建 SqlCommand 对象(用来返回一个结果集,而不是一个整数值)
478 /// </summary>
479 /// <param name="connection">数据库连接</param>
480 /// <param name="storedProcName">存储过程名</param>
481 /// <param name="parameters">存储过程参数</param>
482 /// <returns>SqlCommand</returns>
483 private static SqlCommand BuildQueryCommand(SqlConnection connection,string storedProcName, IDataParameter[] parameters)
484 {
485 SqlCommand command = new SqlCommand( storedProcName, connection );
486 command.CommandType = CommandType.StoredProcedure;
487 foreach (SqlParameter parameter in parameters)
488 {
489 command.Parameters.Add( parameter );
490 }
491 return command;
492 }
493
494 /**//**//**//// <summary>
495 /// 执行存储过程,返回影响的行数
496 /// </summary>
497 /// <param name="storedProcName">存储过程名</param>
498 /// <param name="parameters">存储过程参数</param>
499 /// <param name="rowsAffected">影响的行数</param>
500 /// <returns></returns>
501 public static int RunProcedure(string storedProcName, IDataParameter[] parameters, out int rowsAffected )
502 {
503 using (SqlConnection connection = new SqlConnection(connectionString))
504 {
505 int result;
506 connection.Open();
507 SqlCommand command = BuildIntCommand(connection,storedProcName, parameters );
508 rowsAffected = command.ExecuteNonQuery();
509 result = (int)command.Parameters["ReturnValue"].Value;
510 //Connection.Close();
511 return result;
512 }
513 }
514
515 /**//**//**//// <summary>
516 /// 创建 SqlCommand 对象实例(用来返回一个整数值)
517 /// </summary>
518 /// <param name="storedProcName">存储过程名</param>
519 /// <param name="parameters">存储过程参数</param>
520 /// <returns>SqlCommand 对象实例</returns>
521 private static SqlCommand BuildIntCommand(SqlConnection connection,string storedProcName, IDataParameter[] parameters)
522 {
523 SqlCommand command = BuildQueryCommand(connection,storedProcName, parameters );
524 command.Parameters.Add( new SqlParameter ( "ReturnValue",
525 SqlDbType.Int,4,ParameterDirection.ReturnValue,
526 false,0,0,string.Empty,DataRowVersion.Default,null ));
527 return command;
528 }
529 #endregion
530
531 }
532}
533
文章转载自李天平博客
2using System.Collections;
3using System.Collections.Specialized;
4using System.Data;
5using System.Data.SqlClient;
6using System.Configuration;
7
8namespace SQLServerDAL //可以修改成实际项目的命名空间名称
9{
10 /**//**//**//// <summary>
11 /// Copyright (C) 2004-2008 LiTianPing
12 /// 数据访问基础类(基于SQLServer)
13 /// 用户可以修改满足自己项目的需要。
14 /// </summary>
15 public abstract class DbHelperSQL
16 {
17 //数据库连接字符串(web.config来配置)
18 //<add key="ConnectionString" value="server=127.0.0.1;database=DATABASE;uid=sa;pwd=" />
19 protected static string connectionString = ConfigurationSettings.AppSettings["ConnectionString"];
20 public DbHelperSQL()
21 {
22 }
23
24 公用方法公用方法#region 公用方法
25
26 public static int GetMaxID(string FieldName,string TableName)
27 {
28 string strsql = "select max(" + FieldName + ")+1 from " + TableName;
29 object obj = GetSingle(strsql);
30 if (obj == null)
31 {
32 return 1;
33 }
34 else
35 {
36 return int.Parse(obj.ToString());
37 }
38 }
39 public static bool Exists(string strSql, params SqlParameter[] cmdParms)
40 {
41 object obj = GetSingle(strSql, cmdParms);
42 int cmdresult;
43 if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
44 {
45 cmdresult = 0;
46 }
47 else
48 {
49 cmdresult = int.Parse(obj.ToString());
50 }
51 if (cmdresult == 0)
52 {
53 return false;
54 }
55 else
56 {
57 return true;
58 }
59 }
60 #endregion
61
62 执行简单SQL语句执行简单SQL语句#region 执行简单SQL语句
63
64 /**//**//**//// <summary>
65 /// 执行SQL语句,返回影响的记录数
66 /// </summary>
67 /// <param name="SQLString">SQL语句</param>
68 /// <returns>影响的记录数</returns>
69 public static int ExecuteSql(string SQLString)
70 {
71 using (SqlConnection connection = new SqlConnection(connectionString))
72 {
73 using (SqlCommand cmd = new SqlCommand(SQLString,connection))
74 {
75 try
76 {
77 connection.Open();
78 int rows=cmd.ExecuteNonQuery();
79 return rows;
80 }
81 catch(System.Data.SqlClient.SqlException E)
82 {
83 connection.Close();
84 throw new Exception(E.Message);
85 }
86 }
87 }
88 }
89
90 /**//**//**//// <summary>
91 /// 执行多条SQL语句,实现数据库事务。
92 /// </summary>
93 /// <param name="SQLStringList">多条SQL语句</param>
94 public static void ExecuteSqlTran(ArrayList SQLStringList)
95 {
96 using (SqlConnection conn = new SqlConnection(connectionString))
97 {
98 conn.Open();
99 SqlCommand cmd = new SqlCommand();
100 cmd.Connection=conn;
101 SqlTransaction tx=conn.BeginTransaction();
102 cmd.Transaction=tx;
103 try
104 {
105 for(int n=0;n<SQLStringList.Count;n++)
106 {
107 string strsql=SQLStringList[n].ToString();
108 if (strsql.Trim().Length>1)
109 {
110 cmd.CommandText=strsql;
111 cmd.ExecuteNonQuery();
112 }
113 }
114 tx.Commit();
115 }
116 catch(System.Data.SqlClient.SqlException E)
117 {
118 tx.Rollback();
119 throw new Exception(E.Message);
120 }
121 }
122 }
123 /**//**//**//// <summary>
124 /// 执行带一个存储过程参数的的SQL语句。
125 /// </summary>
126 /// <param name="SQLString">SQL语句</param>
127 /// <param name="content">参数内容,比如一个字段是格式复杂的文章,有特殊符号,可以通过这个方式添加</param>
128 /// <returns>影响的记录数</returns>
129 public static int ExecuteSql(string SQLString,string content)
130 {
131 using (SqlConnection connection = new SqlConnection(connectionString))
132 {
133 SqlCommand cmd = new SqlCommand(SQLString,connection);
134 System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter ( "@content", SqlDbType.NText);
135 myParameter.Value = content ;
136 cmd.Parameters.Add(myParameter);
137 try
138 {
139 connection.Open();
140 int rows=cmd.ExecuteNonQuery();
141 return rows;
142 }
143 catch(System.Data.SqlClient.SqlException E)
144 {
145 throw new Exception(E.Message);
146 }
147 finally
148 {
149 cmd.Dispose();
150 connection.Close();
151 }
152 }
153 }
154 /**//**//**//// <summary>
155 /// 向数据库里插入图像格式的字段(和上面情况类似的另一种实例)
156 /// </summary>
157 /// <param name="strSQL">SQL语句</param>
158 /// <param name="fs">图像字节,数据库的字段类型为image的情况</param>
159 /// <returns>影响的记录数</returns>
160 public static int ExecuteSqlInsertImg(string strSQL,byte[] fs)
161 {
162 using (SqlConnection connection = new SqlConnection(connectionString))
163 {
164 SqlCommand cmd = new SqlCommand(strSQL,connection);
165 System.Data.SqlClient.SqlParameter myParameter = new System.Data.SqlClient.SqlParameter ( "@fs", SqlDbType.Image);
166 myParameter.Value = fs ;
167 cmd.Parameters.Add(myParameter);
168 try
169 {
170 connection.Open();
171 int rows=cmd.ExecuteNonQuery();
172 return rows;
173 }
174 catch(System.Data.SqlClient.SqlException E)
175 {
176 throw new Exception(E.Message);
177 }
178 finally
179 {
180 cmd.Dispose();
181 connection.Close();
182 }
183 }
184 }
185
186 /**//**//**//// <summary>
187 /// 执行一条计算查询结果语句,返回查询结果(object)。
188 /// </summary>
189 /// <param name="SQLString">计算查询结果语句</param>
190 /// <returns>查询结果(object)</returns>
191 public static object GetSingle(string SQLString)
192 {
193 using (SqlConnection connection = new SqlConnection(connectionString))
194 {
195 using(SqlCommand cmd = new SqlCommand(SQLString,connection))
196 {
197 try
198 {
199 connection.Open();
200 object obj = cmd.ExecuteScalar();
201 if((Object.Equals(obj,null))||(Object.Equals(obj,System.DBNull.Value)))
202 {
203 return null;
204 }
205 else
206 {
207 return obj;
208 }
209 }
210 catch(System.Data.SqlClient.SqlException e)
211 {
212 connection.Close();
213 throw new Exception(e.Message);
214 }
215 }
216 }
217 }
218 /**//**//**//// <summary>
219 /// 执行查询语句,返回SqlDataReader
220 /// </summary>
221 /// <param name="strSQL">查询语句</param>
222 /// <returns>SqlDataReader</returns>
223 public static SqlDataReader ExecuteReader(string strSQL)
224 {
225 SqlConnection connection = new SqlConnection(connectionString);
226 SqlCommand cmd = new SqlCommand(strSQL,connection);
227 try
228 {
229 connection.Open();
230 SqlDataReader myReader = cmd.ExecuteReader();
231 return myReader;
232 }
233 catch(System.Data.SqlClient.SqlException e)
234 {
235 throw new Exception(e.Message);
236 }
237
238 }
239 /**//**//**//// <summary>
240 /// 执行查询语句,返回DataSet
241 /// </summary>
242 /// <param name="SQLString">查询语句</param>
243 /// <returns>DataSet</returns>
244 public static DataSet Query(string SQLString)
245 {
246 using (SqlConnection connection = new SqlConnection(connectionString))
247 {
248 DataSet ds = new DataSet();
249 try
250 {
251 connection.Open();
252 SqlDataAdapter command = new SqlDataAdapter(SQLString,connection);
253 command.Fill(ds,"ds");
254 }
255 catch(System.Data.SqlClient.SqlException ex)
256 {
257 throw new Exception(ex.Message);
258 }
259 return ds;
260 }
261 }
262
263
264 #endregion
265
266 执行带参数的SQL语句执行带参数的SQL语句#region 执行带参数的SQL语句
267
268 /**//**//**//// <summary>
269 /// 执行SQL语句,返回影响的记录数
270 /// </summary>
271 /// <param name="SQLString">SQL语句</param>
272 /// <returns>影响的记录数</returns>
273 public static int ExecuteSql(string SQLString,params SqlParameter[] cmdParms)
274 {
275 using (SqlConnection connection = new SqlConnection(connectionString))
276 {
277 using (SqlCommand cmd = new SqlCommand())
278 {
279 try
280 {
281 PrepareCommand(cmd, connection, null,SQLString, cmdParms);
282 int rows=cmd.ExecuteNonQuery();
283 cmd.Parameters.Clear();
284 return rows;
285 }
286 catch(System.Data.SqlClient.SqlException E)
287 {
288 throw new Exception(E.Message);
289 }
290 }
291 }
292 }
293
294
295 /**//**//**//// <summary>
296 /// 执行多条SQL语句,实现数据库事务。
297 /// </summary>
298 /// <param name="SQLStringList">SQL语句的哈希表(key为sql语句,value是该语句的SqlParameter[])</param>
299 public static void ExecuteSqlTran(Hashtable SQLStringList)
300 {
301 using (SqlConnection conn = new SqlConnection(connectionString))
302 {
303 conn.Open();
304 using (SqlTransaction trans = conn.BeginTransaction())
305 {
306 SqlCommand cmd = new SqlCommand();
307 try
308 {
309 //循环
310 foreach (DictionaryEntry myDE in SQLStringList)
311 {
312 string cmdText=myDE.Key.ToString();
313 SqlParameter[] cmdParms=(SqlParameter[])myDE.Value;
314 PrepareCommand(cmd,conn,trans,cmdText, cmdParms);
315 int val = cmd.ExecuteNonQuery();
316 cmd.Parameters.Clear();
317
318 trans.Commit();
319 }
320 }
321 catch
322 {
323 trans.Rollback();
324 throw;
325 }
326 }
327 }
328 }
329
330
331 /**//**//**//// <summary>
332 /// 执行一条计算查询结果语句,返回查询结果(object)。
333 /// </summary>
334 /// <param name="SQLString">计算查询结果语句</param>
335 /// <returns>查询结果(object)</returns>
336 public static object GetSingle(string SQLString,params SqlParameter[] cmdParms)
337 {
338 using (SqlConnection connection = new SqlConnection(connectionString))
339 {
340 using (SqlCommand cmd = new SqlCommand())
341 {
342 try
343 {
344 PrepareCommand(cmd, connection, null,SQLString, cmdParms);
345 object obj = cmd.ExecuteScalar();
346 cmd.Parameters.Clear();
347 if((Object.Equals(obj,null))||(Object.Equals(obj,System.DBNull.Value)))
348 {
349 return null;
350 }
351 else
352 {
353 return obj;
354 }
355 }
356 catch(System.Data.SqlClient.SqlException e)
357 {
358 throw new Exception(e.Message);
359 }
360 }
361 }
362 }
363
364 /**//**//**//// <summary>
365 /// 执行查询语句,返回SqlDataReader
366 /// </summary>
367 /// <param name="strSQL">查询语句</param>
368 /// <returns>SqlDataReader</returns>
369 public static SqlDataReader ExecuteReader(string SQLString,params SqlParameter[] cmdParms)
370 {
371 SqlConnection connection = new SqlConnection(connectionString);
372 SqlCommand cmd = new SqlCommand();
373 try
374 {
375 PrepareCommand(cmd, connection, null,SQLString, cmdParms);
376 SqlDataReader myReader = cmd.ExecuteReader();
377 cmd.Parameters.Clear();
378 return myReader;
379 }
380 catch(System.Data.SqlClient.SqlException e)
381 {
382 throw new Exception(e.Message);
383 }
384
385 }
386
387 /**//**//**//// <summary>
388 /// 执行查询语句,返回DataSet
389 /// </summary>
390 /// <param name="SQLString">查询语句</param>
391 /// <returns>DataSet</returns>
392 public static DataSet Query(string SQLString,params SqlParameter[] cmdParms)
393 {
394 using (SqlConnection connection = new SqlConnection(connectionString))
395 {
396 SqlCommand cmd = new SqlCommand();
397 PrepareCommand(cmd, connection, null,SQLString, cmdParms);
398 using( SqlDataAdapter da = new SqlDataAdapter(cmd) )
399 {
400 DataSet ds = new DataSet();
401 try
402 {
403 da.Fill(ds,"ds");
404 cmd.Parameters.Clear();
405 }
406 catch(System.Data.SqlClient.SqlException ex)
407 {
408 throw new Exception(ex.Message);
409 }
410 return ds;
411 }
412 }
413 }
414
415
416 private static void PrepareCommand(SqlCommand cmd,SqlConnection conn,SqlTransaction trans, string cmdText, SqlParameter[] cmdParms)
417 {
418 if (conn.State != ConnectionState.Open)
419 conn.Open();
420 cmd.Connection = conn;
421 cmd.CommandText = cmdText;
422 if (trans != null)
423 cmd.Transaction = trans;
424 cmd.CommandType = CommandType.Text;//cmdType;
425 if (cmdParms != null)
426 {
427 foreach (SqlParameter parm in cmdParms)
428 cmd.Parameters.Add(parm);
429 }
430 }
431
432 #endregion
433
434 存储过程操作存储过程操作#region 存储过程操作
435
436 /**//**//**//// <summary>
437 /// 执行存储过程
438 /// </summary>
439 /// <param name="storedProcName">存储过程名</param>
440 /// <param name="parameters">存储过程参数</param>
441 /// <returns>SqlDataReader</returns>
442 public static SqlDataReader RunProcedure(string storedProcName, IDataParameter[] parameters )
443 {
444 SqlConnection connection = new SqlConnection(connectionString);
445 SqlDataReader returnReader;
446 connection.Open();
447 SqlCommand command = BuildQueryCommand( connection,storedProcName, parameters );
448 command.CommandType = CommandType.StoredProcedure;
449 returnReader = command.ExecuteReader();
450 return returnReader;
451 }
452
453
454 /**//**//**//// <summary>
455 /// 执行存储过程
456 /// </summary>
457 /// <param name="storedProcName">存储过程名</param>
458 /// <param name="parameters">存储过程参数</param>
459 /// <param name="tableName">DataSet结果中的表名</param>
460 /// <returns>DataSet</returns>
461 public static DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName )
462 {
463 using (SqlConnection connection = new SqlConnection(connectionString))
464 {
465 DataSet dataSet = new DataSet();
466 connection.Open();
467 SqlDataAdapter sqlDA = new SqlDataAdapter();
468 sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters );
469 sqlDA.Fill( dataSet, tableName );
470 connection.Close();
471 return dataSet;
472 }
473 }
474
475
476 /**//**//**//// <summary>
477 /// 构建 SqlCommand 对象(用来返回一个结果集,而不是一个整数值)
478 /// </summary>
479 /// <param name="connection">数据库连接</param>
480 /// <param name="storedProcName">存储过程名</param>
481 /// <param name="parameters">存储过程参数</param>
482 /// <returns>SqlCommand</returns>
483 private static SqlCommand BuildQueryCommand(SqlConnection connection,string storedProcName, IDataParameter[] parameters)
484 {
485 SqlCommand command = new SqlCommand( storedProcName, connection );
486 command.CommandType = CommandType.StoredProcedure;
487 foreach (SqlParameter parameter in parameters)
488 {
489 command.Parameters.Add( parameter );
490 }
491 return command;
492 }
493
494 /**//**//**//// <summary>
495 /// 执行存储过程,返回影响的行数
496 /// </summary>
497 /// <param name="storedProcName">存储过程名</param>
498 /// <param name="parameters">存储过程参数</param>
499 /// <param name="rowsAffected">影响的行数</param>
500 /// <returns></returns>
501 public static int RunProcedure(string storedProcName, IDataParameter[] parameters, out int rowsAffected )
502 {
503 using (SqlConnection connection = new SqlConnection(connectionString))
504 {
505 int result;
506 connection.Open();
507 SqlCommand command = BuildIntCommand(connection,storedProcName, parameters );
508 rowsAffected = command.ExecuteNonQuery();
509 result = (int)command.Parameters["ReturnValue"].Value;
510 //Connection.Close();
511 return result;
512 }
513 }
514
515 /**//**//**//// <summary>
516 /// 创建 SqlCommand 对象实例(用来返回一个整数值)
517 /// </summary>
518 /// <param name="storedProcName">存储过程名</param>
519 /// <param name="parameters">存储过程参数</param>
520 /// <returns>SqlCommand 对象实例</returns>
521 private static SqlCommand BuildIntCommand(SqlConnection connection,string storedProcName, IDataParameter[] parameters)
522 {
523 SqlCommand command = BuildQueryCommand(connection,storedProcName, parameters );
524 command.Parameters.Add( new SqlParameter ( "ReturnValue",
525 SqlDbType.Int,4,ParameterDirection.ReturnValue,
526 false,0,0,string.Empty,DataRowVersion.Default,null ));
527 return command;
528 }
529 #endregion
530
531 }
532}
533
来源:https://www.cnblogs.com/cary263/archive/2007/12/24/1012600.html