DataGrid.EditItemStyle Property
Gets the style properties of the item selected for editing in the DataGrid control.
Assembly: System.Web (in System.Web.dll)
<PersistenceModeAttribute(PersistenceMode.InnerProperty)> Public Overridable ReadOnly Property EditItemStyle As TableItemStyle
Property Value
Type: System.Web.UI.WebControls.TableItemStyleA TableItemStyle object that contains the style properties of the item selected for editing in the DataGrid control. The default value is an empty TableItemStyle object.
Use the EditItemStyle property to provide a custom style for the item selected for editing in the DataGrid control. Common style attributes that can be adjusted include forecolor, backcolor, font, and content alignment within the cell. Providing a different style enhances the appearance of the DataGrid control.
Item style properties in the DataGrid control are inherited from one item style property to another through a hierarchy. Item style properties set lower in the hierarchy are inherited by item style properties higher in the hierarchy. For example, if you specify a red font for the ItemStyle property, all other item style properties in the DataGrid control will also have a red font. This allows you to provide a common appearance for the control by setting a single item style property. You can override the inherited style settings for an item style property that is higher in the hierarchy by setting its style properties. For example, you can specify a blue font for the AlternatingItemStyle property, overriding the red font specified in the ItemStyle property. The following table lists the hierarchy order from highest to lowest.
Precedence | Style Property |
|---|---|
1 | EditItemStyle |
2 | |
3 | |
4 | |
5 |
To specify a custom style for the item selected for editing, place the <EditItemStyle> tags between the opening and closing tags of the DataGrid control. You can then list the style attributes within the opening <EditItemStyle> tag.
The following code example demonstrates how to use the EditItemStyle property to set the background color of the item selected for editing to yellow.
<%@ 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 language="VB" runat="server"> Dim Cart As New DataTable Dim CartView As DataView Sub Page_Load(sender As Object, e As EventArgs) Dim dr As DataRow If Session("ShoppingCart") Is Nothing Then Cart.Columns.Add(New DataColumn("Qty", GetType(String))) Cart.Columns.Add(New DataColumn("Item", GetType(String))) Cart.Columns.Add(New DataColumn("Price", GetType(String))) Session("ShoppingCart") = Cart ' Create sample data. Dim i As Integer For i = 1 To 4 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)).ToString() Cart.Rows.Add(dr) Next i Else Cart = CType(Session("ShoppingCart"), DataTable) End If CartView = New DataView(Cart) CartView.Sort = "Item" If Not IsPostBack Then BindGrid() End If End Sub 'Page_Load Sub MyDataGrid_Edit(sender As Object, e As DataGridCommandEventArgs) MyDataGrid.EditItemIndex = e.Item.ItemIndex BindGrid() End Sub 'MyDataGrid_Edit Sub MyDataGrid_Cancel(sender As Object, e As DataGridCommandEventArgs) MyDataGrid.EditItemIndex = - 1 BindGrid() End Sub 'MyDataGrid_Cancel Sub MyDataGrid_Update(sender As Object, e As DataGridCommandEventArgs) ' For bound columns, the edited value is stored in a TextBox. ' The TextBox is the 0th element in the column's cell. Dim qtyText As TextBox = CType(e.Item.Cells(2).Controls(0), TextBox) Dim priceText As TextBox = CType(e.Item.Cells(3).Controls(0), TextBox) Dim item As String = e.Item.Cells(1).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 old entry. CartView.RowFilter = "Item='" & item & "'" If CartView.Count > 0 Then CartView.Delete(0) End If CartView.RowFilter = "" ' Add new entry. dr = Cart.NewRow() dr(0) = qty dr(1) = item dr(2) = price Cart.Rows.Add(dr) MyDataGrid.EditItemIndex = - 1 BindGrid() End Sub 'MyDataGrid_Update Sub BindGrid() MyDataGrid.DataSource = CartView MyDataGrid.DataBind() End Sub 'BindGrid </script> <head runat="server"> <title>DataGrid Editing Example</title> </head> <body style="font: 10pt verdana"> <form id="form1" runat="server"> <h3>DataGrid Editing Example</h3> <asp:DataGrid id="MyDataGrid" runat="server" BorderColor="black" BorderWidth="1" CellPadding="3" Font-Names="Verdana" Font-Size="8pt" OnEditCommand="MyDataGrid_Edit" OnCancelCommand="MyDataGrid_Cancel" OnUpdateCommand="MyDataGrid_Update" AutoGenerateColumns="false"> <HeaderStyle BackColor="#aaaadd"> </HeaderStyle> <EditItemStyle BackColor="yellow"> </EditItemStyle> <Columns> <asp:EditCommandColumn EditText="Edit" CancelText="Cancel" UpdateText="Update" HeaderText="Edit Command Column"> <ItemStyle Wrap="false"> </ItemStyle> <HeaderStyle Wrap="false"> </HeaderStyle> </asp:EditCommandColumn> <asp:BoundColumn HeaderText="Item" ReadOnly="true" DataField="Item"/> <asp:BoundColumn HeaderText="Quantity" DataField="Qty"/> <asp:BoundColumn HeaderText="Price" DataField="Price"/> </Columns> </asp:DataGrid> </form> </body> </html>
Available since 1.1