GridViewCommandEventArgs.CommandSource プロパティ
アセンブリ: System.Web (system.web.dll 内)

コマンドのソースを表す System.Object クラスのインスタンス。

CommandSource プロパティを使用して、コマンドのソースを表すオブジェクトのプロパティにアクセスします。GridViewCommandEventArgs オブジェクトの場合、コマンドのソースは、ユーザーがクリックしたボタンが格納されている GridView コントロールです。

CommandSource プロパティを使用して、ユーザーがクリックしたボタンが格納されている GridView コントロールにアクセスする方法を次の例に示します。
<%@ Page language="VB" %> <script runat="server"> Sub CustomersGridView_RowCommand(ByVal sender As Object, ByVal e As GridViewCommandEventArgs) ' If multiple ButtonField columns are used, use the ' CommandName property to determine which button was clicked. If e.CommandName = "Add" Then ' Convert the row index stored in the CommandArgument ' property to an Integer. Dim index As Integer = Convert.ToInt32(e.CommandArgument) ' Retrieve the row that contains the button clicked ' by the user from the Rows collection. Use the ' CommandSource property to access the GridView control. Dim customersGridView As GridView = CType(e.CommandSource, GridView) Dim row As GridViewRow = customersGridView.Rows(index) ' Create a new ListItem object for the customer in the row. Dim item As New ListItem() item.Text = Server.HtmlDecode(row.Cells(1).Text) + " " + Server.HtmlDecode(row.Cells(2).Text) ' If the author is not already in the ListBox, add the ListItem ' object to the Items collection of a ListBox control. If Not CustomersListBox.Items.Contains(item) Then CustomersListBox.Items.Add(item) End If End If End Sub Sub CustomersGridView_RowCreated(ByVal sender As Object, ByVal e As GridViewRowEventArgs) ' The GridViewCommandEventArgs class does not contain a ' property that indicates which row's command button was ' clicked. To identify which row was clicked, use the button's ' CommandArgument property by setting it to the row's index. If e.Row.RowType = DataControlRowType.DataRow Then ' Retrieve the LinkButton control from the first column. Dim addButton As LinkButton = CType(e.Row.Cells(0).Controls(0), LinkButton) ' Set the LinkButton's CommandArgument property with the ' row's index. addButton.CommandArgument = e.Row.RowIndex.ToString() End If End Sub </script> <html> <body> <form runat="server"> <h3>GridViewCommandEventArgs Example</h3> <table width="100%"> <tr> <td width="50%"> <asp:gridview id="CustomersGridView" datasourceid="CustomersSource" autogeneratecolumns="false" onrowcommand="CustomersGridView_RowCommand" onrowcreated="CustomersGridView_RowCreated" runat="server"> <columns> <asp:buttonfield buttontype="Link" commandname="Add" text="Add"/> <asp:boundfield datafield="CompanyName" headertext="Company Name"/> <asp:boundfield datafield="City" headertext="City"/> </columns> </asp:gridview> </td> <td valign="top" width="50%"> Customers: <br/> <asp:listbox id="CustomersListBox" runat="server"/> </td> </tr> </table> <!-- 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], [City] From [Customers]" connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>" runat="server"/> </form> </body> </html>
<%@ Page language="C#" %> <script runat="server"> void CustomersGridView_RowCommand(Object sender, GridViewCommandEventArgs e) { // If multiple ButtonField columns are used, use the // CommandName property to determine which button was clicked. if(e.CommandName=="Add") { // Convert the row index stored in the CommandArgument // property to an Integer. int index = Convert.ToInt32(e.CommandArgument); // Retrieve the row that contains the button clicked // by the user from the Rows collection. Use the // CommandSource property to access the GridView control. GridView customersGridView = (GridView)e.CommandSource; GridViewRow row = customersGridView.Rows[index]; // Create a new ListItem object for the customer in the row. ListItem item = new ListItem(); item.Text = Server.HtmlDecode(row.Cells[1].Text) + " " + Server.HtmlDecode(row.Cells[2].Text); // If the author is not already in the ListBox, add the ListItem // object to the Items collection of a ListBox control. if(!CustomersListBox.Items.Contains(item)) { CustomersListBox.Items.Add(item); } } } void CustomersGridView_RowCreated(Object sender, GridViewRowEventArgs e) { // The GridViewCommandEventArgs class does not contain a // property that indicates which row's command button was // clicked. To identify which row was clicked, use the button's // CommandArgument property by setting it to the row's index. if(e.Row.RowType == DataControlRowType.DataRow) { // Retrieve the LinkButton control from the first column. LinkButton addButton = (LinkButton)e.Row.Cells[0].Controls[0]; // Set the LinkButton's CommandArgument property with the // row's index. addButton.CommandArgument = e.Row.RowIndex.ToString(); } } </script> <html> <body> <form runat="server"> <h3>GridViewCommandEventArgs Example</h3> <table width="100%"> <tr> <td width="50%"> <asp:gridview id="CustomersGridView" datasourceid="CustomersSource" autogeneratecolumns="false" onrowcommand="CustomersGridView_RowCommand" onrowcreated="CustomersGridView_RowCreated" runat="server"> <columns> <asp:buttonfield buttontype="Link" commandname="Add" text="Add"/> <asp:boundfield datafield="CompanyName" headertext="Company Name"/> <asp:boundfield datafield="City" headertext="City"/> </columns> </asp:gridview> </td> <td valign="top" width="50%"> Customers: <br/> <asp:listbox id="CustomersListBox" runat="server"/> </td> </tr> </table> <!-- 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], [City] From [Customers]" connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>" runat="server"/> </form> </body> </html>

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