DetailsView.DataKeyNames 属性

  • 参考

定义

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

获取或设置一个数组，该数组包含数据源的键字段的名称。

public:
 virtual property cli::array <System::String ^> ^ DataKeyNames { cli::array <System::String ^> ^ get(); void set(cli::array <System::String ^> ^ value); };
[System.ComponentModel.TypeConverter(typeof(System.Web.UI.WebControls.StringArrayConverter))]
public virtual string[] DataKeyNames { get; set; }
[<System.ComponentModel.TypeConverter(typeof(System.Web.UI.WebControls.StringArrayConverter))>]
member this.DataKeyNames : string[] with get, set
Public Overridable Property DataKeyNames As String()

属性值

String[]

一个数组，包含数据源的键字段的名称。

属性
TypeConverterAttribute

示例

下面的代码示例演示如何使用 DataKeyNames 属性标识绑定到控件的数据源的 DetailsView 键字段。


<%@ Page language="C#" %>

<!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" >
  <head runat="server">
    <title>DetailsView AutoGenerateDeleteButton Example</title>
</head>
<body>
    <form id="Form1" runat="server">
        
      <h3>DetailsView AutoGenerateDeleteButton Example</h3>
                
        <asp:detailsview id="CustomersDetailView"
          datasourceid="DetailsViewSource"
          datakeynames="CustomerID"
          autogeneratedeletebutton="true"  
          autogeneraterows="true"
          allowpaging="true"  
          runat="server">
               
          <headerstyle backcolor="Navy"
            forecolor="White"/>
                    
        </asp:detailsview>
        
        <!-- This example uses Microsoft SQL Server and connects  -->
        <!-- to the Northwind sample database. Use an ASP.NET     -->
        <!-- expression to retrieve the connection string value   -->
        <!-- from the web.config file.                            -->
        <asp:SqlDataSource ID="DetailsViewSource" runat="server" 
            ConnectionString=
              "<%$ ConnectionStrings:NorthWindConnectionString%>"
            InsertCommand="INSERT INTO [Customers]([CustomerID], 
              [CompanyName], [Address], [City], [PostalCode], [Country]) 
              VALUES (@CustomerID, @CompanyName, @Address, @City, 
              @PostalCode, @Country)"
            SelectCommand="Select [CustomerID], [CompanyName], 
              [Address], [City], [PostalCode], [Country] From 
              [Customers]">
        </asp:SqlDataSource>
    </form>
  </body>
</html>


<%@ Page language="VB" %>

<!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" >
  <head runat="server">
    <title>DetailsView AutoGenerateDeleteButton Example</title>
</head>
<body>
    <form id="Form1" runat="server">
        
      <h3>DetailsView AutoGenerateDeleteButton Example</h3>
                
        <asp:detailsview id="CustomersDetailView"
          datasourceid="DetailsViewSource"
          datakeynames="CustomerID"
          autogeneratedeletebutton="true"  
          autogeneraterows="true"
          allowpaging="true"  
          runat="server">
               
          <headerstyle backcolor="Navy"
            forecolor="White"/>
                    
        </asp:detailsview>
        
        <!-- This example uses Microsoft SQL Server and connects  -->
        <!-- to the Northwind sample database. Use an ASP.NET     -->
        <!-- expression to retrieve the connection string value   -->
        <!-- from the web.config file.                            -->
        <asp:SqlDataSource ID="DetailsViewSource" runat="server" 
            ConnectionString=
              "<%$ ConnectionStrings:NorthWindConnectionString%>"
            InsertCommand="INSERT INTO [Customers]([CustomerID], 
              [CompanyName], [Address], [City], [PostalCode], [Country]) 
              VALUES (@CustomerID, @CompanyName, @Address, @City, 
              @PostalCode, @Country)"
            SelectCommand="Select [CustomerID], [CompanyName], 
              [Address], [City], [PostalCode], [Country] From 
              [Customers]">
        </asp:SqlDataSource>
    </form>
  </body>
</html>

注解

使用该 DataKeyNames 属性可以指定一个以逗号分隔的字段名称列表，该列表表示数据源的主键。 DataKeyNames设置属性后，控件DetailsView会自动创建一个DataKey对象，该对象代表当前记录的关键字段或字段，并将其存储在属性中DataKey。 AutoGenerateColumns当属性也设置为true时，该DetailsView控件会自动确保属性中指定的字段或字段是只读的DataKeyNames。

备注

必须设置 DataKeyNames 控件的 DetailsView 自动更新、删除和插入功能的属性才能正常工作。

Visible如果行字段的属性设置为false，则行不显示在控件中DetailsView，行的数据不会往返于客户端。 如果希望不可见的行的数据进行往返，请将字段名称添加到 DataKeyNames 该属性。

适用于

另请参阅