UpdateCommand Property (SQLiteDataTable)
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Gets or sets a SQLite statement used to update records in the data source.
Syntax
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'Declaration
Public Shadows Property UpdateCommand As SQLiteCommand |
Property Value
A
SQLiteCommand 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
SQLiteDataTable.
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public void UseDataTable(SQLiteConnection sqConnection)
{
SQLiteDataTable myDataTable = new SQLiteDataTable("SELECT * FROM Dept", sqConnection);
try
{
myDataTable.Active = true;
myDataTable.Rows[3]["DName"] = "Researches";
myDataTable.UpdateCommand = new SQLiteCommand("UPDATE Dept SET DeptNo = :DeptNo, DName = :DName, Loc = 'Modified' " +
"WHERE DeptNo = :oldDeptNo", sqConnection);
myDataTable.UpdateCommand.Parameters.Add("DeptNo", SQLiteType.Int32, 0, "DeptNo");
myDataTable.UpdateCommand.Parameters.Add("DName", SQLiteType.Text, 15, "DName");
myDataTable.UpdateCommand.Parameters.Add("oldDeptNo", SQLiteType.Int32, 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 sqConnection As SQLiteConnection)
Dim myDataTable As SQLiteDataTable = New SQLiteDataTable("SELECT * FROM Dept", sqConnection)
Try
myDataTable.Active = True
myDataTable.Rows(3)("DName") = "Researches"
myDataTable.UpdateCommand = New SQLiteCommand("UPDATE Dept SET DeptNo = :DeptNo, DName = :DName, Loc='Modified' " & _
"WHERE DeptNo = :oldDeptNo", sqConnection)
myDataTable.UpdateCommand.Parameters.Add("DeptNo", SQLiteType.Int32, 0, "DeptNo")
myDataTable.UpdateCommand.Parameters.Add("DName", SQLiteType.Text, 15, "DName")
myDataTable.UpdateCommand.Parameters.Add("oldDeptNo", SQLiteType.Int32, 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
