datarow

I have tried the following code, but nothing is displayed in datagridview. Any Suggestions? string strFilterOption = "dtcolnPurchaseProductExpProductNo=270"; dgvProductExp.DataSource = dtPurchaseProductExp.Select(strFilterOption); From MSDN The DataGridView class supports the standard Windows Forms data-binding model. This means the data source can be of any type that implements one of the following interfaces: The IList interface, including one-dimensional arrays. The IListSource interface, such as the DataTable and DataSet classes. The IBindingList interface, such as the BindingList class.

My code is 2x longer than it would be if I could automatically set IsDBNull to "" or simply roll over it without an error. This is my code: Dim conn As New SqlConnection conn.ConnectionString = Module1.DBConn2 Dim sqlCommand = New SqlCommand("SELECT * FROM table", conn) conn.Open() Dim sqlDataset As DataSet = New DataSet() Dim sqlDataAdapter As SqlDataAdapter = New SqlDataAdapter(sqlCommand) sqlDataAdapter.Fill(sqlDataset) conn.Close() For Each rs As DataRow In sqlDataset.Tables(0).Rows If Not IsDBNull(rs("column")) Then Response.Write(rs("column")) Else Response.Write("") End If Response

I have an ASP.NET GridView that's bound to an ObjectDataSource (which is bound to a MySQL database). On this grid, I have 2 unbound ButtonField columns that I want to trigger server-side events. Hence I have added an eventhandler method to the GridView 's RowCommand event. In the code of said eventhandler, I need to somehow get hold of the underlying DataRow that was clicked on by the user. However, I can't seem to get this to work; if I use code like the following the selectedRow variable is always null : protected void searchResultsGridView_RowCommand(object sender, GridViewCommandEventArgs

I want to loop through the values of a particular column in datatable? can anyone please give the C# coding? Hi try below code snippet using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Data; namespace ConsoleApplication1 { class Program { public static DataTable GetDataTable() { //Create a new DataTable object DataTable objDataTable = new DataTable(); //Create three columns with string as their type objDataTable.Columns.Add("Column 1", typeof(string)); objDataTable.Columns.Add("Column 2", typeof(string)); objDataTable.Columns.Add("Column 3",

What are the benefits of using the c# method DataRow.IsNull to determine a null value over checking if the row equals DbNull.value? if(ds.Tables[0].Rows[0].IsNull("ROWNAME")) {do stuff} vs if(ds.Tables[0].Rows[0]["ROWNAME"] == DbNull.value) {do stuff} There is no real practical benefit. Use whichever one seems more readable to you. As to the particular differences between them, the basic answer is that IsNull queries the null state for a particular record within a column. Using == DBNull.Value actually retrieves the value and does substitution in the case that it's actually null. In other

I need to iterate the columnname and column datatype from a specific row. All of the examples I have seen have iterated an entire datatable. I want to pass a single row to a function to do a bunch of conditional processing. I want to separate the conditional processing for ease of readability. This is what I have: private void doMore(DataRow dr) { foreach (DataColumn c in dr.ItemArray) //loop through the columns. { MessageBox.Show(c.ColumnName.ToString()); } } The error returned is System.InvalidCastException: Unable to cast object of type 'System.String' to type 'System.Data.DataColumn'. How

I have a problem with a DataRow that I'm really struggling with. The datarow is read in from an Excel spreadsheet using an OleDbConnection. If I try to select data from the DataRow using the column name, it returns DBNull even though there is data there. But it's not quite that simple. datarow.Table.Columns[5].ColumnName returns "my column". datarow["my column"] returns DBNull. datarow[5] returns 500. datarow[datarow.Table.Columns[5].ColumnName] returns DBNull. (just to make sure its not a typo!) I could just select things from the datarow using the column number, but I dislike doing that