EditCommandColumn.ButtonType Property
.NET Framework (current version)
Gets or sets the button type for the column.
Assembly: System.Web (in System.Web.dll)
Property Value
Type: System.Web.UI.WebControls.ButtonColumnTypeOne of the ButtonColumnType values. The default value is LinkButton.
| Exception | Condition |
|---|---|
| ArgumentOutOfRangeException | The specified button type is not one of the ButtonColumnType values. |
Use the ButtonType property to specify whether the buttons in the column display as push buttons or hyperlinks.
The value of this property is stored in view state.
The following example demonstrates how to use the ButtonType property to display the Edit command buttons as push buttons.
<%@ Page Language="VB" AutoEventWireup="True" %> <%@ Import Namespace="System.Data" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <script runat="server"> ' The Cart and CartView objects temporarily store the data source ' for the DataGrid control while the page is being processed. Dim Cart As DataTable = New DataTable() Dim CartView As DataView Sub Page_Load(sender As Object, e As EventArgs) ' With a database, use an select query to retrieve the data. Because ' the data source in this example is an in-memory DataTable, retrieve ' the data from session state if it exists; otherwise create the data ' source. GetSource() ' The DataGrid control maintains state between posts to the server; ' it only needs to be bound to a data source the first time the page ' is loaded or when the data source is updated. If Not IsPostBack Then BindGrid() End If End Sub Sub ItemsGrid_Edit(sender As Object, e As DataGridCommandEventArgs) ' Set the EditItemIndex property to the index of the item clicked ' in the DataGrid control to enable editing for that item. Be sure ' to rebind the DateGrid to the data source to refresh the control. ItemsGrid.EditItemIndex = e.Item.ItemIndex BindGrid() End Sub Sub ItemsGrid_Cancel(sender As Object, e As DataGridCommandEventArgs) ' Set the EditItemIndex property to -1 to exit editing mode. ' Be sure to rebind the DateGrid to the data source to refresh ' the control. ItemsGrid.EditItemIndex = -1 BindGrid() End Sub Sub ItemsGrid_Update(sender As Object, e As DataGridCommandEventArgs) ' Retrieve the text boxes that contain the values to update. ' For bound columns, the edited value is stored in a TextBox. ' The TextBox is the 0th control in a cell's Controls collection. ' Each cell in the Cells collection of a DataGrid item represents ' a column in the DataGrid control. Dim qtyText As TextBox = CType(e.Item.Cells(3).Controls(0), TextBox) Dim priceText As TextBox = CType(e.Item.Cells(4).Controls(0), TextBox) ' Retrieve the updated values. Dim item As String = e.Item.Cells(2).Text Dim qty As String = qtyText.Text Dim price As String = priceText.Text Dim dr As DataRow ' With a database, use an update command to update the data. ' Because the data source in this example is an in-memory ' DataTable, delete the old row and replace it with a new one. ' Remove the old entry and clear the row filter. CartView.RowFilter = "Item='" & item & "'" If CartView.Count > 0 Then CartView.Delete(0) End If CartView.RowFilter = "" ' *************************************************************** ' Insert data validation code here. Be sure to validate the ' values entered by the user before converting to the appropriate ' data types and updating the data source. ' *************************************************************** ' Add the new entry. dr = Cart.NewRow() dr(0) = Convert.ToInt32(qty) dr(1) = item ' If necessary, remove the '$' character from the price before ' converting it to a Double. If price.Chars(0) = "$" Then dr(2) = Convert.ToDouble(price.Substring(1)) Else dr(2) = Convert.ToDouble(price) End If Cart.Rows.Add(dr) ' Set the EditItemIndex property to -1 to exit editing mode. ' Be sure to rebind the DateGrid to the data source to refresh ' the control. ItemsGrid.EditItemIndex = -1 BindGrid() End Sub Sub BindGrid() ' Set the data source and bind to the Data Grid control. ItemsGrid.DataSource = CartView ItemsGrid.DataBind() End Sub Sub GetSource() ' For this example, the data source is a DataTable that is stored ' in session state. If the data source does not exist, create it; ' otherwise, load the data. If Session("ShoppingCart") Is Nothing Then ' Create the sample data. Dim dr As DataRow ' Define the columns of the table. Cart.Columns.Add(new DataColumn("Qty", GetType(Int32))) Cart.Columns.Add(new DataColumn("Item", GetType(String))) Cart.Columns.Add(new DataColumn("Price", GetType(Double))) ' Store the table in session state to persist its values ' between posts to the server. Session("ShoppingCart") = Cart ' Populate the DataTable with sample data. Dim i As Integer For i = 1 To 9 dr = Cart.NewRow() If (i Mod 2) <> 0 Then dr(0) = 2 Else dr(0) = 1 End If dr(1) = "Item " & i.ToString() dr(2) = (1.23 * (i + 1)) Cart.Rows.Add(dr) Next i Else ' Retrieve the sample data from session state. Cart = CType(Session("ShoppingCart"), DataTable) End If ' Create a DataView and specify the field to sort by. CartView = New DataView(Cart) CartView.Sort="Item" Return End Sub Sub ItemsGrid_Command(sender As Object, e As DataGridCommandEventArgs) Select (CType(e.CommandSource, LinkButton)).CommandName Case "Delete" DeleteItem(e) ' Add other cases here, if there are multiple ButtonColumns in ' the DataGrid control. Case Else ' Do nothing. End Select End Sub Sub DeleteItem(e As DataGridCommandEventArgs) ' e.Item is the table row where the command is raised. For bound ' columns, the value is stored in the Text property of a TableCell. Dim itemCell As TableCell = e.Item.Cells(2) Dim item As String = itemCell.Text ' Remove the selected item from the data source. CartView.RowFilter = "Item='" & item + "'" If CartView.Count > 0 Then CartView.Delete(0) End If CartView.RowFilter = "" ' Rebind the data source to refresh the DataGrid control. BindGrid() End Sub </script> <head runat="server"> <title>DataGrid Editing Example</title> </head> <body> <form id="form1" runat="server"> <h3>DataGrid Editing Example</h3> <asp:DataGrid id="ItemsGrid" BorderColor="black" BorderWidth="1" CellPadding="3" OnEditCommand="ItemsGrid_Edit" OnCancelCommand="ItemsGrid_Cancel" OnUpdateCommand="ItemsGrid_Update" OnItemCommand="ItemsGrid_Command" AutoGenerateColumns="false" runat="server"> <HeaderStyle BackColor="#aaaadd"> </HeaderStyle> <Columns> <asp:EditCommandColumn EditText="Edit" CancelText="Cancel" UpdateText="Update" HeaderText="Edit item"> <ItemStyle Wrap="False"> </ItemStyle> <HeaderStyle Wrap="False"> </HeaderStyle> </asp:EditCommandColumn> <asp:ButtonColumn HeaderText="Delete item" ButtonType="LinkButton" Text="Delete" CommandName="Delete"/> <asp:BoundColumn HeaderText="Item" ReadOnly="True" DataField="Item"/> <asp:BoundColumn HeaderText="Quantity" DataField="Qty"/> <asp:BoundColumn HeaderText="Price" DataField="Price" DataFormatString="{0:c}"/> </Columns> </asp:DataGrid> </form> </body> </html>
.NET Framework
Available since 1.1
Available since 1.1
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