FormView.DataKey 속성

정의

표시된 레코드의 기본 키를 나타내는 DataKey 개체를 가져옵니다.

public:
 virtual property System::Web::UI::WebControls::DataKey ^ DataKey { System::Web::UI::WebControls::DataKey ^ get(); };
[System.ComponentModel.Browsable(false)]
public virtual System.Web.UI.WebControls.DataKey DataKey { get; }
[<System.ComponentModel.Browsable(false)>]
member this.DataKey : System.Web.UI.WebControls.DataKey
Public Overridable ReadOnly Property DataKey As DataKey

속성 값

DataKey

표시된 레코드의 기본 키를 나타내는 DataKey 개체입니다.

특성

예제

다음 예제에서는 키 필드의 값을 확인 하려면 속성을 사용 DataKey 하는 방법을 보여 줍니다.


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

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
  
  void EmployeeFormView_ItemCreated(Object sender, EventArgs e)
  {
    DataKey key = EmployeeFormView.DataKey;
    MessageLabel.Text = "The key value is " + key.Value.ToString() + ".";
  }
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>FormView DataKey Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>FormView DataKey Example</h3>
                       
      <asp:formview id="EmployeeFormView"
        datasourceid="EmployeeSource"
        allowpaging="true"
        datakeynames="EmployeeID"
        onitemcreated="EmployeeFormView_ItemCreated"  
        runat="server">
        
        <itemtemplate>
        
          <table>
            <tr>
              <td>
                <asp:image id="EmployeeImage"
                  imageurl='<%# Eval("PhotoPath") %>'
                  alternatetext='<%# Eval("LastName") %>' 
                  runat="server"/>
              </td>
              <td>
                <h3><%# Eval("FirstName") %> <%# Eval("LastName") %></h3>      
                <%# Eval("Title") %>        
              </td>
            </tr>
          </table>
        
        </itemtemplate>
                  
      </asp:formview>
      
      <br/><br/>
      
      <asp:label id="MessageLabel"
        forecolor="Red"
        runat="server"/>
          
      <!-- 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="EmployeeSource"
        selectcommand="Select [EmployeeID], [LastName], [FirstName], [Title], [PhotoPath] From [Employees]"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>" 
        runat="server"/>
            
    </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">
<script runat="server">
  
  Sub EmployeeFormView_ItemCreated(ByVal sender As Object, ByVal e As EventArgs)
  
    Dim key As DataKey = EmployeeFormView.DataKey
    MessageLabel.Text = "The key value is " & key.Value.ToString() & "."
  
  End Sub
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>FormView DataKey Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>FormView DataKey Example</h3>
                       
      <asp:formview id="EmployeeFormView"
        datasourceid="EmployeeSource"
        allowpaging="true"
        datakeynames="EmployeeID"
        onitemcreated="EmployeeFormView_ItemCreated"  
        runat="server">
        
        <itemtemplate>
        
          <table>
            <tr>
              <td>
                <asp:image id="EmployeeImage"
                  imageurl='<%# Eval("PhotoPath") %>'
                  alternatetext='<%# Eval("LastName") %>' 
                  runat="server"/>
              </td>
              <td>
                <h3><%# Eval("FirstName") %> <%# Eval("LastName") %></h3>      
                <%# Eval("Title") %>        
              </td>
            </tr>
          </table>
        
        </itemtemplate>
        
      </asp:formview>
      
      <br/><br/>
      
      <asp:label id="MessageLabel"
        forecolor="Red"
        runat="server"/>
          
      <!-- 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="EmployeeSource"
        selectcommand="Select [EmployeeID], [LastName], [FirstName], [Title], [PhotoPath] From [Employees]"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>" 
        runat="server"/>
            
    </form>
  </body>
</html>

설명

속성이 DataKeyNames 설정 FormView 되면 컨트롤은 현재 레코드의 속성에 나열된 DataKeyNames 필드 또는 필드의 키/값 쌍을 포함하는 개체를 자동으로 만듭니다DataKey. DataKey 속성을 사용하여 이 DataKey 개체를 가져옵니다. 이 속성은 일반적으로 속성에 지정된 DataKeyNames 필드에 대한 키와 해당 값을 가져오는 데 사용됩니다.

참고

바로 가기로 속성을 사용하여 속성에 SelectedValue 나열된 DataKeyNames 첫 번째 키 필드의 값을 확인할 수도 있습니다.

적용 대상

추가 정보