C# SQLDataAdapter - Not inserting data into DB

问题

Here's what I got: User selects from a checklistbox of database names one they'd like to archive. Switch case in place to catch the selection.

case "userSelection":
                sqlAdapter = CreateMyAdapter("dbName", true, sqlconn, null);
                sqlAdapter.SelectCommand.CommandText += "";
                sqlAdapter.Fill(myDS.tableName);
                sqlAdapter.Dispose();

The adapter:

private SqlDataAdapter CreateMyAdapter(string TableName, bool IncludeUpdates, SqlConnection sqlConn, SqlTransaction sqlTran)
{
    SqlDataAdapter sqlAdapter = null;
    SqlConnection sqlConnArchive = new SqlConnection();

    strSQL = "SELECT " + TableName + ".* FROM " + TableName;
    sqlAdapter = new SqlDataAdapter(strSQL, sqlConn);

    // Right here, I create another sqlConnection that is pointed to
    // another datasource.

    sqlConnArchive = getThisOtherConnection();

    SqlCommand sqlComm;

    if (IncludeUpdates)
    {
        string strInsertSQL = "<insertQuery>";

        sqlComm = new SqlCommand(strInsertSQL, sqlConnArchive);
        sqlComm.Parameters.Add("@TableID", SqlDbType.Int, 0, "TableID");
        // More params here...

        sqlAdapter.InsertCommand = sqlComm;

        // Update

        // Delete

    }
 }
        return sqlAdapter;

The issue: As you can see sqlConn is the connection that is tied to the SELECT command. And sqlConnArchive is tied to the INSERT. The thought here is that I could select the data from DB_1 if you will, and insert it into DB_2 using the same SQLDataAdapter. But the issue that I'm running into is trying to insert. The select works fine, and at this line sqlAdapter.Fill(myDS.tableName); once fill executes the data is there. But the INSERT isn't working.

A few things:

I tested to see if perhaps SQLDataAdapter couldn't handle multiple datasources/connections, switched things around so it was pointing the the same DB just different tables, and I'm seeing the same results.
I've confirmed that the issue does not reside within the INSERT query.
There are no errors, just steps right over in debug.
I have tried several permutations of .Update() and none of them worked. This project that I've been assigned, throughout the entire thing it appears that .Fill(); is what is submitting the data back to the DB.
I've tested the database side and connectivity is a go. No issues with login, etc etc..

Any help is greatly appreciated.

Please note - I tried to place an even larger emphasis on the word "greatly" but was limited by my toolset. Apparently SOF doesn't support bold, blink, underline, flames, or embedded music.

回答1:

I think you want ExecuteNonQuery.

var rowsAffected = sqlAdapter.InsertCommand.ExecuteNonQuery();

This executes the statement and then returns the number of rows affected. The Fill method won't run any InsertCommands.

来源：https://stackoverflow.com/questions/32385295/c-sharp-sqldataadapter-not-inserting-data-into-db

标签

winforms

sqldataadapter