通过

DataGrid.EditItemStyle 属性

  • 参考

定义

命名空间:
System.Web.UI.WebControls
程序集:
System.Web.dll

获取在 DataGrid 控件中选定来进行编辑的项的样式属性。

public:
 virtual property System::Web::UI::WebControls::TableItemStyle ^ EditItemStyle { System::Web::UI::WebControls::TableItemStyle ^ get(); };
[System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.InnerProperty)]
public virtual System.Web.UI.WebControls.TableItemStyle EditItemStyle { get; }
[<System.Web.UI.PersistenceMode(System.Web.UI.PersistenceMode.InnerProperty)>]
member this.EditItemStyle : System.Web.UI.WebControls.TableItemStyle
Public Overridable ReadOnly Property EditItemStyle As TableItemStyle

属性值

TableItemStyle

一个 TableItemStyle 对象，该对象包含在 DataGrid 控件中选定来进行编辑的项的样式属性。 默认值是一个空 TableItemStyle 对象。

属性
PersistenceModeAttribute

示例

下面的代码示例演示如何使用 EditItemStyle 属性设置选定项的背景色，以便编辑为黄色。

<%@ Page Language="C#" 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="C#" runat="server">
 
    DataTable Cart = new DataTable();
    DataView CartView;   
 
    void Page_Load(Object sender, EventArgs e) 
    {
       DataRow dr;
 
       if (Session["ShoppingCart"] == null) 
       {       
 
          Cart.Columns.Add(new DataColumn("Qty", typeof(String)));
          Cart.Columns.Add(new DataColumn("Item", typeof(String)));
          Cart.Columns.Add(new DataColumn("Price", typeof(String)));
          Session["ShoppingCart"] = Cart;
             
          // Create sample data.
          for (int i = 1; i <= 4; i++) 
          {
             dr = Cart.NewRow();
             if (i % 2 != 0)
                dr[0] = "2";
             else
                dr[0] = "1";
             dr[1] = "Item " + i.ToString();
             dr[2] = (1.23 * (i + 1)).ToString();
             Cart.Rows.Add(dr);
          }
       }
       else
          Cart = (DataTable)Session["ShoppingCart"];          
 
       CartView = new DataView(Cart);
       CartView.Sort="Item";
 
       if (!IsPostBack)
          BindGrid(); 
                   
    }
 
    void MyDataGrid_Edit(Object sender, DataGridCommandEventArgs e) 
    {
       MyDataGrid.EditItemIndex = e.Item.ItemIndex;
       BindGrid();
    }
 
    void MyDataGrid_Cancel(Object sender, DataGridCommandEventArgs e) 
    {
       MyDataGrid.EditItemIndex = -1;
       BindGrid();
    }
 
    void MyDataGrid_Update(Object sender, DataGridCommandEventArgs e) 
    {
       // For bound columns, the edited value is stored in a TextBox.
       // The TextBox is the 0th element in the column's cell.
       TextBox qtyText = (TextBox)e.Item.Cells[2].Controls[0];
       TextBox priceText = (TextBox)e.Item.Cells[3].Controls[0];
 
       String item = e.Item.Cells[1].Text;
       String qty = qtyText.Text;
       String price = priceText.Text;
        
       DataRow dr;
 
       // 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)
          CartView.Delete(0);
       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();
    }
 
    void BindGrid() 
    {
       MyDataGrid.DataSource = CartView;
       MyDataGrid.DataBind();
    }
 
 </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>

<%@ 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>

注解

使用 EditItemStyle 属性为在控件中 DataGrid 编辑所选的项提供自定义样式。 可调整的常见样式属性包括单元格中的前色、后色、字体和内容对齐方式。 提供不同的样式可增强控件的外观 DataGrid 。

控件中的 DataGrid 项样式属性通过层次结构从一个项样式属性继承到另一个项样式属性。 层次结构中较低设置的项样式属性由层次结构中较高级别的项样式属性继承。 例如，如果为 ItemStyle 属性指定红色字体，控件 DataGrid 中的所有其他项样式属性也将具有红色字体。 这样，可以通过设置单个项样式属性来为控件提供常见外观。 可以通过设置其样式属性来替代层次结构中较高项样式属性的继承样式设置。 例如，可以为属性指定蓝色字体 AlternatingItemStyle ，重写属性 ItemStyle 中指定的红色字体。 下表列出了从高到低的层次结构顺序。

优先级 Style 属性
1 EditItemStyle
2 SelectedItemStyle
3 AlternatingItemStyle
4 ItemStyle
5 ControlStyle

若要为选定编辑的项指定自定义样式，请在 <EditItemStyle> 控件的 DataGrid 开始标记和结束标记之间放置标记。 然后，可以在打开 <EditItemStyle> 标记中列出样式属性。

适用于

另请参阅