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GridView.SelectedDataKey 속성

정의

DataKey 컨트롤에서 선택한 행의 데이터 키 값이 들어 있는 GridView 개체를 가져옵니다.

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

속성 값

DataKey

DataKey 컨트롤에서 선택한 행의 GridView입니다. 기본값은 null로, 현재 선택된 행이 없음을 나타냅니다.

특성

예외

DataKeyNames 속성에 데이터 키가 지정되어 있지 않은 경우

예제

다음 예제에서는 컨트롤에서 SelectedDataKey 선택한 행 GridView 의 데이터 키 값을 확인 하려면 속성을 사용 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 CustomersGridView_SelectedIndexChanged(Object sender, EventArgs e)  
  {
        
    // Display the primary key value of the selected row.
    Message.Text = "The primary key value of the selected row is " +
      CustomersGridView.SelectedDataKey.Value.ToString() + ".";
    
  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridView SelectedDataKey Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridView SelectedDataKey Example</h3>
            
      <asp:label id="Message"
        forecolor="Red"
        runat="server"/>
                
      <br/><br/>

      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSource" 
        allowpaging="true"
        autogeneratecolumns="true"
        autogenerateselectbutton="true"    
        datakeynames="CustomerID"
        onselectedindexchanged="CustomersGridView_SelectedIndexChanged"   
        runat="server">
                
        <selectedrowstyle backcolor="LightBlue"
          forecolor="DarkBlue"/> 
               
      </asp:gridview>
            
      <!-- 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="CustomersSource"
        selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
        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 CustomersGridView_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs)
        
    ' Display the primary key value of the selected row.
    Message.Text = "The primary key value of the selected row is " & _
      CustomersGridView.SelectedDataKey.Value.ToString() & "."
    
  End Sub

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>GridView SelectedDataKey Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>GridView SelectedDataKey Example</h3>
            
      <asp:label id="Message"
        forecolor="Red"
        runat="server"/>
                
      <br/><br/>

      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSource" 
        allowpaging="true"
        autogeneratecolumns="true"
        autogenerateselectbutton="true"    
        datakeynames="CustomerID"
        onselectedindexchanged="CustomersGridView_SelectedIndexChanged"   
        runat="server">
                
        <selectedrowstyle backcolor="LightBlue"
          forecolor="DarkBlue"/> 
               
      </asp:gridview>
            
      <!-- 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="CustomersSource"
        selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>" 
        runat="server"/>
            
    </form>
  </body>
</html>

다음 예제에서는 마스터/세부 정보 시나리오에서 두 번째 키 필드를 매개 변수로 사용하는 방법을 보여 줍니다. GridView 컨트롤은 Northwind 데이터베이스의 Order Details 테이블에서 레코드를 표시하는 데 사용됩니다. 컨트롤에서 레코드를 GridView 선택하면 Products 테이블의 제품 세부 정보가 컨트롤에 DetailsView 표시됩니다. ProductID는 컨트롤의 두 번째 키 이름입니다 GridView . 두 번째 키에 액세스하기 위해 GridView1.SelectedDataKey[1]의 DetailsView 값이 컨트롤 컨트롤의 SqlDataSource 개체로 ControlParameter 사용됩니다PropertyName.


<%@ 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>Selecting Data Key Values</title>
</head>
<body>
  <form id="form1" runat="server">
  <div>
    <asp:SqlDataSource 
      ID="SqlDataSource1" 
      runat="server" 
      ConnectionString="<%$ ConnectionStrings:NorthWindConnectionString%>"
      ProviderName="System.Data.SqlClient" 
      SelectCommand="SELECT * FROM [Order Details]">
    </asp:SqlDataSource>

    <asp:SqlDataSource 
      ID="SqlDataSource2" 
      runat="server" 
      ConnectionString="<%$ ConnectionStrings:NorthWindConnectionString%>"
      ProviderName="System.Data.SqlClient" 
      SelectCommand="SELECT * FROM [Products]WHERE [ProductID] = @productid">
      <SelectParameters>
        <asp:ControlParameter 
          Name="productid" 
          ControlID="GridView1" 
          PropertyName="SelectedDataKey[1]" />
      </SelectParameters>
    </asp:SqlDataSource>
    
  </div>

  <asp:GridView 
    ID="GridView1" 
    runat="server" 
    AllowPaging="True" 
    AutoGenerateColumns="False"
    DataKeyNames="OrderID,ProductID" DataSourceID="SqlDataSource1">
    <Columns>
      <asp:CommandField ShowSelectButton="True" />
      <asp:BoundField DataField="OrderID" HeaderText="OrderID" ReadOnly="True"/>
      <asp:BoundField DataField="ProductID" HeaderText="ProductID" ReadOnly="True" />
      <asp:BoundField DataField="UnitPrice" HeaderText="UnitPrice" />
      <asp:BoundField DataField="Quantity" HeaderText="Quantity" />
      <asp:BoundField DataField="Discount" HeaderText="Discount" />
      </Columns>
    </asp:GridView>
    <br />
    <asp:DetailsView 
      ID="DetailsView1" 
      runat="server" 
      AutoGenerateRows="False" 
      DataKeyNames="ProductID"
      DataSourceID="SqlDataSource2" 
      Height="50px" Width="125px">
      <Fields>
        <asp:BoundField 
          DataField="ProductID" 
          HeaderText="ProductID" 
          InsertVisible="False"
          ReadOnly="True" />
        <asp:BoundField DataField="ProductName" HeaderText="ProductName"/>
        <asp:BoundField DataField="SupplierID" HeaderText="SupplierID"/>
        <asp:BoundField DataField="CategoryID" HeaderText="CategoryID" />
        <asp:BoundField DataField="QuantityPerUnit" HeaderText="QuantityPerUnit" />
        <asp:BoundField DataField="UnitPrice" HeaderText="UnitPrice" />
        <asp:BoundField DataField="UnitsInStock" HeaderText="UnitsInStock" />
        <asp:BoundField DataField="UnitsOnOrder" HeaderText="UnitsOnOrder" />
        <asp:BoundField DataField="ReorderLevel" HeaderText="ReorderLevel" />
        <asp:CheckBoxField DataField="Discontinued" HeaderText="Discontinued" />
      </Fields>
    </asp:DetailsView>
  </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>Selecting Data Key Values</title>
</head>
<body>
  <form id="form1" runat="server">
  <div>
    <asp:SqlDataSource 
      ID="SqlDataSource1" 
      runat="server" 
      ConnectionString="<%$ ConnectionStrings:NorthWindConnectionString%>"
      ProviderName="System.Data.SqlClient" 
      SelectCommand="SELECT * FROM [Order Details]">
    </asp:SqlDataSource>

    <asp:SqlDataSource 
      ID="SqlDataSource2" 
      runat="server" 
      ConnectionString="<%$ ConnectionStrings:NorthWindConnectionString%>"
      ProviderName="System.Data.SqlClient" 
      SelectCommand="SELECT * FROM [Products]WHERE [ProductID] = @productid">
      <SelectParameters>
        <asp:ControlParameter 
          Name="productid" 
          ControlID="GridView1" 
          PropertyName="SelectedDataKey[1]" />
      </SelectParameters>
    </asp:SqlDataSource>
    
  </div>

  <asp:GridView 
    ID="GridView1" 
    runat="server" 
    AllowPaging="True" 
    AutoGenerateColumns="False"
    DataKeyNames="OrderID,ProductID" DataSourceID="SqlDataSource1">
    <Columns>
      <asp:CommandField ShowSelectButton="True" />
      <asp:BoundField DataField="OrderID" HeaderText="OrderID" ReadOnly="True"/>
      <asp:BoundField DataField="ProductID" HeaderText="ProductID" ReadOnly="True" />
      <asp:BoundField DataField="UnitPrice" HeaderText="UnitPrice" />
      <asp:BoundField DataField="Quantity" HeaderText="Quantity" />
      <asp:BoundField DataField="Discount" HeaderText="Discount" />
      </Columns>
    </asp:GridView>
    <br />
    <asp:DetailsView 
      ID="DetailsView1" 
      runat="server" 
      AutoGenerateRows="False" 
      DataKeyNames="ProductID"
      DataSourceID="SqlDataSource2" 
      Height="50px" Width="125px">
      <Fields>
        <asp:BoundField 
          DataField="ProductID" 
          HeaderText="ProductID" 
          InsertVisible="False"
          ReadOnly="True" />
        <asp:BoundField DataField="ProductName" HeaderText="ProductName"/>
        <asp:BoundField DataField="SupplierID" HeaderText="SupplierID"/>
        <asp:BoundField DataField="CategoryID" HeaderText="CategoryID" />
        <asp:BoundField DataField="QuantityPerUnit" HeaderText="QuantityPerUnit" />
        <asp:BoundField DataField="UnitPrice" HeaderText="UnitPrice" />
        <asp:BoundField DataField="UnitsInStock" HeaderText="UnitsInStock" />
        <asp:BoundField DataField="UnitsOnOrder" HeaderText="UnitsOnOrder" />
        <asp:BoundField DataField="ReorderLevel" HeaderText="ReorderLevel" />
        <asp:CheckBoxField DataField="Discontinued" HeaderText="Discontinued" />
      </Fields>
    </asp:DetailsView>
  </form>
</body>
</html>

설명

속성이 DataKeyNames 설정 GridView 되면 컨트롤은 지정된 필드 또는 필드의 값이나 값을 사용하여 컨트롤의 각 행에 대한 개체를 자동으로 만듭니다 DataKey . DataKey 그런 다음 개체가 컨트롤의 DataKeys 컬렉션에 추가됩니다. 일반적으로 DataKeys 이 속성은 컨트롤의 DataKey 특정 데이터 행에 대한 개체를 검색하는 GridView 데 사용됩니다. 그러나 현재 선택한 행의 개체를 검색 DataKey 하기만 하면 되는 경우 이 속성을 바로 가기로 사용하면 SelectedDataKey 됩니다.

참고

컬렉션에서 DataKeys 속성에 지정된 인덱스에서 개체를 SelectedIndex 검색하는 DataKey 것과 같습니다. 이 속성을 사용하여 SelectedValue 현재 선택한 행의 데이터 키 값을 직접 검색할 수도 있습니다.

개체를 ControlParameter 만들고 첫 번째 필드가 아닌 키 필드에 액세스하려는 경우 개체의 ControlParameter 속성에 PropertyName 인덱싱된 SelectedDataKey 속성을 사용합니다. 아래에 예제가 나와 있습니다.

적용 대상

추가 정보