UpdateCommand Property (SqlDataTable)
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Gets or sets a SQL Server statement used to update records in the data source.
Syntax
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'Declaration
Public Shadows Property UpdateCommand As SqlCommand |
Property Value
A
SqlCommand used during an update operation to update records in the data source that correspond to modified rows in the
System.Data.DataSet.
Example
This sample shows how to modify and display data using
SqlDataTable.
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public void UseDataTable(SqlConnection myConnection)
{
SqlDataTable myDataTable = new SqlDataTable("SELECT * FROM Test.Dept", myConnection);
try
{
myDataTable.Active = true;
myDataTable.Rows[3]["DName"] = "Researches";
myDataTable.UpdateCommand = new SqlCommand("UPDATE Test.Dept SET DeptNo = :DeptNo, DName = :DName, Loc = 'Modified' " +
"WHERE DeptNo = :oldDeptNo", myConnection);
myDataTable.UpdateCommand.Parameters.Add("DeptNo", SqlType.Int, 0, "DeptNo");
myDataTable.UpdateCommand.Parameters.Add("DName", SqlType.VarChar, 15, "DName");
myDataTable.UpdateCommand.Parameters.Add("oldDeptNo", SqlType.Int, 0, "DeptNo").SourceVersion = DataRowVersion.Original;
Console.WriteLine(myDataTable.Update()+" rows updated.");
myDataTable.Active = false;
//Refresh the table to check custom updates
myDataTable.Active = true;
foreach(DataRow myRow in myDataTable.Rows)
{
foreach(DataColumn myCol in myDataTable.Columns)
{
Console.Write(myRow[myCol]+"\t");
}
Console.WriteLine();
}
}
finally
{
myDataTable.Active = false;
}
} |
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Public Sub UseDataTable(ByVal myConnection As SqlConnection)
Dim myDataTable As SqlDataTable = New SqlDataTable("SELECT * FROM Test.Dept", myConnection)
Try
myDataTable.Active = True
myDataTable.Rows(3)("DName") = "Researches"
myDataTable.UpdateCommand = New SqlCommand("UPDATE Test.Dept SET DeptNo = :DeptNo, DName = :DName, Loc='Modified' " & _
"WHERE DeptNo = :oldDeptNo", myConnection)
myDataTable.UpdateCommand.Parameters.Add("DeptNo", SqlType.Int, 0, "DeptNo")
myDataTable.UpdateCommand.Parameters.Add("DName", SqlType.VarChar, 15, "DName")
myDataTable.UpdateCommand.Parameters.Add("oldDeptNo", SqlType.Int, 0, "DeptNo").SourceVersion = DataRowVersion.Original
Console.WriteLine(myDataTable.Update() & " rows updated.")
myDataTable.Active = False
' Refresh the table to check custom updates
myDataTable.Active = True
Dim myRow As DataRow
Dim myCol As DataColumn
For Each myRow In myDataTable.Rows
For Each myCol In myDataTable.Columns
Console.Write(myRow(myCol) & Chr(9))
Next myCol
Console.WriteLine()
Next myRow
Finally
myDataTable.Active = False
End Try
End Sub |
See Also
