UpdateCommand Property (SQLiteDataTable)

In This Topic

Gets or sets a SQLite statement used to update records in the data source.

Syntax

Visual Basic
C#

'Declaration
 
Public Shadows Property UpdateCommand As SQLiteCommand

public new SQLiteCommand UpdateCommand {get; set;}

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.

Remarks

UpdateCommand uses its own Connection if it is created. Otherwise UpdateCommand uses Connection.

Example

This sample shows how to modify and display data using SQLiteDataTable.

csharp

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;
        }
}

Visual Basic

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

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

SQLiteDataTable Class
SQLiteDataTable Members
DeleteCommand Property
InsertCommand Property
SelectCommand Property

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