DataGrid.EditItemStyle Property

 
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Gets the style properties of the item selected for editing in the DataGrid control.

Namespace:   System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

<PersistenceModeAttribute(PersistenceMode.InnerProperty)>
Public Overridable ReadOnly Property EditItemStyle As TableItemStyle

Property Value

Type: System.Web.UI.WebControls.TableItemStyle

A 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

SelectedItemStyle

3

AlternatingItemStyle

4

ItemStyle

5

ControlStyle

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>

.NET Framework
Available since 1.1
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