Updating Values Using UserControl and FormTemplate

Referring Controls in UserControls

The code below shows how to retrieve a value from a control in a user control custom edit form in Telerik RadGrid. The example demonstrates how to refer to controls by obtaining references to them with the FindControl(controlId) method. This text can be used to update your DataSource (you can also see this online demo for more info):

Private Sub RadGrid1_UpdateCommand(ByVal source As Object, ByVal e As Telerik.Web.UI.GridCommandEventArgs) Handles RadGrid1.UpdateCommand
    Dim editedItem As GridEditableItem = CType(e.Item, GridEditableItem)
    'Locate the user control using its const ID (the public const GridEditFormItem.EditFormUserControlID)  
    Dim MyUserControl As UserControl = CType(e.Item.FindControl(GridEditFormItem.EditFormUserControlID), UserControl)
    'Locate the changed row in the DataSource
    Dim changedRows As DataRow() = Me.Employees.Select("EmployeeID = " & editedItem.OwnerTableView.DataKeyValues(editedItem.ItemIndex)("EmployeeID"))

    If (Not changedRows.Length = 1) Then
        e.Canceled = True
        Return
    End If
    'Update new values
    Dim newValues As Hashtable = New Hashtable
    newValues("Country") = CType(MyUserControl.FindControl("TextBox7"), TextBox).Text
    newValues("City") = CType(MyUserControl.FindControl("TextBox8"), TextBox).Text
    newValues("Region") = CType(MyUserControl.FindControl("TextBox9"), TextBox).Text
    newValues("HomePhone") = CType(MyUserControl.FindControl("TextBox10"), TextBox).Text
    newValues("BirthDate") = CType(MyUserControl.FindControl("TextBox11"), TextBox).Text
    newValues("TitleOfCourtesy") = CType(MyUserControl.FindControl("ddlTOC"), DropDownList).SelectedItem.Value
    newValues("Notes") = CType(MyUserControl.FindControl("TextBox1"), TextBox).Text
    newValues("Address") = CType(MyUserControl.FindControl("TextBox6"), TextBox).Text
    newValues("FirstName") = CType(MyUserControl.FindControl("TextBox2"), TextBox).Text
    newValues("LastName") = CType(MyUserControl.FindControl("TextBox3"), TextBox).Text
    newValues("HireDate") = CType(MyUserControl.FindControl("Textbox5"), TextBox).Text
    newValues("Title") = CType(MyUserControl.FindControl("TextBox4"), TextBox).Text
    changedRows(0).BeginEdit()
    Try
        Dim entry As DictionaryEntry
        For Each entry In newValues
            changedRows(0)(CType(entry.Key, String)) = entry.Value
        Next
        changedRows(0).EndEdit()
        Me.Employees.AcceptChanges()
    Catch ex As Exception
        changedRows(0).CancelEdit()
        e.Canceled = True
    End Try
End Sub

void RadGrid1_UpdateCommand(object source, Telerik.Web.UI.GridCommandEventArgs e)
{
    GridEditableItem editedItem = e.Item as GridEditableItem;
    //Locate the user control using its const ID (the public const GridEditFormItem.EditFormUserControlID)
    UserControl userControl = (UserControl)e.Item.FindControl(GridEditFormItem.EditFormUserControlID);
    //Prepare new row to add it in the DataSource
    DataRow[] changedRows = this.Employees.Select("EmployeeID = " + editedItem.OwnerTableView.DataKeyValues[editedItem.ItemIndex]["EmployeeID"]);
    if (changedRows.Length != 1)
    {
        RadGrid1.Controls.Add(new LiteralControl("Unable to locate the Employee for updating."));
        e.Canceled = true;
        return;
    }
    //Update new values
    Hashtable newValues = new Hashtable();
    newValues["Country"] = (userControl.FindControl("TextBox7") as TextBox).Text;
    newValues["City"] = (userControl.FindControl("TextBox8") as TextBox).Text;
    newValues["Region"] = (userControl.FindControl("TextBox9") as TextBox).Text;
    newValues["HomePhone"] = (userControl.FindControl("TextBox10") as TextBox).Text;
    newValues["BirthDate"] = (userControl.FindControl("TextBox11") as TextBox).Text;
    newValues["TitleOfCourtesy"] = (userControl.FindControl("ddlTOC") as DropDownList).SelectedItem.Value;
    newValues["Notes"] = (userControl.FindControl("TextBox1") as TextBox).Text;
    newValues["Address"] = (userControl.FindControl("TextBox6") as TextBox).Text;
    newValues["FirstName"] = (userControl.FindControl("TextBox2") as TextBox).Text;
    newValues["LastName"] = (userControl.FindControl("TextBox3") as TextBox).Text;
    newValues["HireDate"] = (userControl.FindControl("Textbox5") as TextBox).Text;
    newValues["Title"] = (userControl.FindControl("TextBox4") as TextBox).Text;
    changedRows[0].BeginEdit();
    try
    {
        foreach (DictionaryEntry entry in newValues)
        {
            changedRows[0][(string)entry.Key] = entry.Value;
        }
        changedRows[0].EndEdit();
        this.Employees.AcceptChanges();
    }
    catch (Exception ex)
    {
        changedRows[0].CancelEdit();
        RadGrid1.Controls.Add(new LiteralControl("Unable to update Employees. Reason: " + ex.Message));
        e.Canceled = true;
    }
}

Referring controls in FormTemplate

The code below shows to retrieve a value from a control in a form template custom edit form in Telerik RadGrid. The example demonstrates how to refer a controls obtaining references to them with the FindControl(controlId) method in such type of edit form. This text can be used to update your DataSourcemanually:

private void RadGrid1_ItemCommand(object source, Telerik.Web.UI.GridCommandEventArgs e)
{
    if (e.CommandName == RadGrid.UpdateCommandName)
    {
        GridEditableItem editedItem = e.Item as GridEditableItem;
        //Locate the changed row in the DataSource
        DataRow[] changedRows = this.Employees.Select("EmployeeID = " + editedItem["EmployeeID"].Text);

        if (changedRows.Length != 1)
        {
            this.Label1.Text += "Unable to locate the Employee for updating.";
            e.Canceled = true;
            return;
        }
        //Update new values
        Hashtable newValues = new Hashtable();
        newValues["Country"] = (editedItem.FindControl("TextBox7") as TextBox).Text;
        newValues["City"] = (editedItem.FindControl("TextBox8") as TextBox).Text;
        newValues["Region"] = (editedItem.FindControl("TextBox9") as TextBox).Text;
        newValues["HomePhone"] = (editedItem.FindControl("TextBox10") as TextBox).Text;
        newValues["BirthDate"] = (editedItem.FindControl("TextBox11") as TextBox).Text;
        newValues["TitleOfCourtesy"] = (editedItem.FindControl("ddlTOC") as DropDownList).SelectedItem.Value;
        newValues["Notes"] = (editedItem.FindControl("TextBox1") as TextBox).Text;
        newValues["Address"] = (editedItem.FindControl("TextBox6") as TextBox).Text;
        newValues["FirstName"] = (editedItem.FindControl("TextBox2") as TextBox).Text;
        newValues["LastName"] = (editedItem.FindControl("TextBox3") as TextBox).Text;
        newValues["HireDate"] = (editedItem.FindControl("Textbox5") as TextBox).Text;
        newValues["Title"] = (editedItem.FindControl("TextBox4") as TextBox).Text;
        changedRows[0].BeginEdit();
        try
        {
            foreach (DictionaryEntry entry in newValues)
            {
                changedRows[0][(string)entry.Key] = entry.Value;
            }
            changedRows[0].EndEdit();
        }
        catch (Exception ex)
        {
            changedRows[0].CancelEdit();
            Label1.Text += "Unable to update Employees. Reason: " + ex.Message;
            e.Canceled = true;
        }
        //Code for updating the database can go here...
        Label1.Text += "Employee " + editedItem["EmployeeID"].Text + " updated";
    }
}

Private Sub RadGrid1_ItemCommand(ByVal source As Object, ByVal e As WebControls.GridCommandEventArgs) Handles RadGrid1.ItemCommand
    If (e.CommandName = RadGrid.UpdateCommandName) Then
        Dim editedItem As GridEditableItem = CType(e.Item, GridEditableItem)
        'Locate the changed row in the DataSource
        Dim changedRows As DataRow() = Me.Employees.Select("EmployeeID = " + editedItem("EmployeeID").Text)
        If (Not changedRows.Length = 1) Then
            Me.Label1.Text += "Unbale to locate the Employee for updating."
            e.Canceled = True
            Return
        End If
        'Update new values
        Dim newValues As Hashtable = New Hashtable
        newValues("Country") = CType(editedItem.FindControl("TextBox7"), TextBox).Text
        newValues("City") = CType(editedItem.FindControl("TextBox8"), TextBox).Text
        newValues("Region") = CType(editedItem.FindControl("TextBox9"), TextBox).Text
        newValues("HomePhone") = CType(editedItem.FindControl("TextBox10"), TextBox).Text
        newValues("BirthDate") = CType(editedItem.FindControl("TextBox11"), TextBox).Text
        newValues("TitleOfCourtesy") = CType(editedItem.FindControl("ddlTOC"), DropDownList).SelectedItem.Value
        newValues("Notes") = CType(editedItem.FindControl("TextBox1"), TextBox).Text
        newValues("Address") = CType(editedItem.FindControl("TextBox6"), TextBox).Text
        newValues("FirstName") = CType(editedItem.FindControl("TextBox2"), TextBox).Text
        newValues("LastName") = CType(editedItem.FindControl("TextBox3"), TextBox).Text
        newValues("HireDate") = CType(editedItem.FindControl("Textbox5"), TextBox).Text
        newValues("Title") = CType(editedItem.FindControl("TextBox4"), TextBox).Text
        changedRows(0).BeginEdit()
        Try
            Dim entry As DictionaryEntry
            For Each entry In newValues
                changedRows(0)(CType(entry.Key, String)) = entry.Value
            Next
            changedRows(0).EndEdit()
        Catch ex As Exception
            changedRows(0).CancelEdit()
            Label1.Text += "Unable to update Employees. Reason: " & ex.Message
            e.Canceled = True
        End Try
        'Code for updating the database can go here...
        Label1.Text += "Employee " & editedItem("EmployeeID").Text & " updated"
    End If
End Sub

Note that with form template you may prefer the codeless approach by enabling the automatic operations supported by Telerik RadGrid.