DetailsViewCommandEventArgs Třída

Definice

Poskytuje data pro událost ItemCommand.

public ref class DetailsViewCommandEventArgs : System::Web::UI::WebControls::CommandEventArgs
public class DetailsViewCommandEventArgs : System.Web.UI.WebControls.CommandEventArgs
type DetailsViewCommandEventArgs = class
    inherit CommandEventArgs
Public Class DetailsViewCommandEventArgs
Inherits CommandEventArgs
Dědičnost
DetailsViewCommandEventArgs

Příklady

Následující příklad kódu ukazuje, jak použít DetailsViewCommandEventArgs objekt předaný obslužné rutině události pro ItemCommand událost k určení názvu příkazu tlačítka, na které uživatel kliknul. V tomto příkladu se používá model kódování s jedním souborem.


<%@ 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 ItemDetailsView_ItemCommand(Object sender, 
      DetailsViewCommandEventArgs e)
  {

    // Use the CommandName property to determine which button
    // was clicked. 
    if (e.CommandName == "Add")
    {

      // Add the customer to the customer list. 

      // Get the row that contains the company name. In this
      // example, the company name is in the second row (index 1)  
      // of the DetailsView control.
      DetailsViewRow row = ItemDetailsView.Rows[1];

      // Get the company's name from the appropriate cell.
      // In this example, the company name is in the second cell  
      // (index 1) of the row.
      String name = row.Cells[1].Text;

      // Create a ListItem object with the company name.
      ListItem item = new ListItem(name);

      // Add the ListItem object to the ListBox control, if the 
      // item does not already exist.
      if (!CustomerListBox.Items.Contains(item))
      {
        CustomerListBox.Items.Add(item);
      }

    }

  }
  
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>DetailsViewCommandEventArgs Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>DetailsViewCommandEventArgs Example</h3>
  
      <asp:detailsview id="ItemDetailsView"
        datasourceid="DetailsViewSource"
        allowpaging="true"
        autogeneraterows="false" 
        onitemcommand="ItemDetailsView_ItemCommand"  
        runat="server">
        <fields>
          <asp:boundfield datafield="CustomerID"
            headertext="Customer ID"/>
          <asp:boundfield datafield="CompanyName"
            headertext="Company Name"/>
          <asp:boundfield datafield="Address"
            headertext="Address"/>
          <asp:boundfield datafield="City"
            headertext="City"/>
          <asp:boundfield datafield="PostalCode"
            headertext="ZIP Code"/>
          <asp:boundfield datafield="Country"
            headertext="Country"/>
          <asp:buttonfield buttontype="Link"
            causesvalidation="false"
            text="Add to List"
            commandname="Add"/>
        </fields>
      </asp:detailsview>
      
      <br/><br/>
      
      Selected Customers:<br/>
      <asp:listbox id="CustomerListBox"
        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="DetailsViewSource"
        selectcommand="Select [CustomerID], [CompanyName], [Address], 
          [City], [PostalCode], [Country] From [Customers]"
        connectionstring=
            "<%$ ConnectionStrings:NorthWindConnectionString%>" 
        runat="server"/>  
  
    </form>
  </body>
</html>

<%@ page language="VB" autoeventwireup="false" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
  
  Sub ItemDetailsView_ItemCommand(ByVal sender As Object, _
    ByVal e As DetailsViewCommandEventArgs) _
    Handles ItemDetailsView.ItemCommand

    ' Use the CommandName property to determine which button
    ' was clicked. 
    If e.CommandName = "Add" Then

      ' Add the customer to the customer list. 

      ' Get the row that contains the company name. In this
      ' example, the company name is in the second row (index 1)  
      ' of the DetailsView control.
      Dim row As DetailsViewRow = ItemDetailsView.Rows(1)

      ' Get the company's name from the appropriate cell.
      ' In this example, the company name is in the second cell  
      ' (index 1) of the row.
      Dim name As String = row.Cells(1).Text

      ' Create a ListItem object with the company name.
      Dim item As New ListItem(name)

      ' Add the ListItem object to the ListBox control, if the 
      ' item does not already exist.
      If Not CustomerListBox.Items.Contains(item) Then

        CustomerListBox.Items.Add(item)
        
      End If

    End If

  End Sub
  
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>DetailsViewCommandEventArgs Example</title>
</head>
<body>
    <form id="form1" runat="server">
    
      <h3>DetailsViewCommandEventArgs Example</h3>
  
      <asp:detailsview id="ItemDetailsView"
        datasourceid="DetailsViewSource"
        allowpaging="true"
        autogeneraterows="false"  
        runat="server">
        <fields>
          <asp:boundfield datafield="CustomerID"
            headertext="Customer ID"/>
          <asp:boundfield datafield="CompanyName"
            headertext="Company Name"/>
          <asp:boundfield datafield="Address"
            headertext="Address"/>
          <asp:boundfield datafield="City"
            headertext="City"/>
          <asp:boundfield datafield="PostalCode"
            headertext="ZIP Code"/>
          <asp:boundfield datafield="Country"
            headertext="Country"/>
          <asp:buttonfield buttontype="Link"
            causesvalidation="false"
            text="Add to List"
            commandname="Add"/>
        </fields>
      </asp:detailsview>
      
      <br/><br/>
      
      Selected Customers:<br/>
      <asp:listbox id="CustomerListBox"
        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="DetailsViewSource"
        selectcommand="Select [CustomerID], [CompanyName], [Address], 
          [City], [PostalCode], [Country] From [Customers]"
        connectionstring=
            "<%$ ConnectionStrings:NorthWindConnectionString%>" 
        runat="server"/>  
  
    </form>
  </body>
</html>

Následující příklad kódu ukazuje verzi modelu kódování na pozadí předchozího příkladu. Aby tento příklad fungoval, musíte níže uvedený kód zkopírovat do přidruženého souboru kódu na pozadí.

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!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>DetailsViewCommandEventArgs Example</title>
</head>
<body>
    <form id="Form1" runat="server">
    
      <h3>DetailsViewCommandEventArgs Example</h3>
  
      <asp:detailsview id="ItemDetailsView"
        datasourceid="DetailsViewSource"
        allowpaging="true"
        autogeneraterows="false" 
        onitemcommand="ItemDetailsView_ItemCommand"  
        runat="server">
        <fields>
          <asp:boundfield datafield="CustomerID"
            headertext="Customer ID"/>
          <asp:boundfield datafield="CompanyName"
            headertext="Company Name"/>
          <asp:boundfield datafield="Address"
            headertext="Address"/>
          <asp:boundfield datafield="City"
            headertext="City"/>
          <asp:boundfield datafield="PostalCode"
            headertext="ZIP Code"/>
          <asp:boundfield datafield="Country"
            headertext="Country"/>
          <asp:buttonfield buttontype="Link"
            causesvalidation="false"
            text="Add to List"
            commandname="Add"/>
        </fields>
      </asp:detailsview>
      
      <br/><br/>
      
      Selected Customers:<br/>
      <asp:listbox id="CustomerListBox"
        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="DetailsViewSource"
        selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>" 
        runat="server"/>  
  
    </form>
  </body>
</html>
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="DefaultVB.aspx.vb" Inherits="DefaultVB" %>

<!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>DetailsViewCommandEventArgs Example</title>
</head>
<body>
    <form id="Form1" runat="server">
    
      <h3>DetailsViewCommandEventArgs Example</h3>
  
      <asp:detailsview id="ItemDetailsView"
        datasourceid="DetailsViewSource"
        allowpaging="true"
        autogeneraterows="false" 
        onitemcommand="ItemDetailsView_ItemCommand"  
        runat="server">
        <fields>
          <asp:boundfield datafield="CustomerID"
            headertext="Customer ID"/>
          <asp:boundfield datafield="CompanyName"
            headertext="Company Name"/>
          <asp:boundfield datafield="Address"
            headertext="Address"/>
          <asp:boundfield datafield="City"
            headertext="City"/>
          <asp:boundfield datafield="PostalCode"
            headertext="ZIP Code"/>
          <asp:boundfield datafield="Country"
            headertext="Country"/>
          <asp:buttonfield buttontype="Link"
            causesvalidation="false"
            text="Add to List"
            commandname="Add"/>
        </fields>
      </asp:detailsview>
      
      <br/><br/>
      
      Selected Customers:<br/>
      <asp:listbox id="CustomerListBox"
        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="DetailsViewSource"
        selectcommand="Select [CustomerID], [CompanyName], [Address], 
          [City], [PostalCode], [Country] From [Customers]"
        connectionstring=
          "<%$ ConnectionStrings:NorthWindConnectionString%>" 
        runat="server"/>  
  
    </form>
  </body>
</html>

Následující příklad kódu ukazuje soubor kódu na pozadí pro předchozí příklad.

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class _Default : System.Web.UI.Page
{
    public void ItemDetailsView_ItemCommand(Object sender, DetailsViewCommandEventArgs e)
    {

        // Use the CommandName property to determine which button
        // was clicked. 
        if (e.CommandName == "Add")
        {

            // Add the customer to the customer list. 

            // Get the row that contains the company name. In this
            // example, the company name is in the second row (index 1)  
            // of the DetailsView control.
            DetailsViewRow row = ItemDetailsView.Rows[1];

            // Get the company's name from the appropriate cell.
            // In this example, the company name is in the second cell  
            // (index 1) of the row.
            String name = row.Cells[1].Text;

            // Create a ListItem object with the company name.
            ListItem item = new ListItem(name);

            // Add the ListItem object to the ListBox control, if the 
            // item does not already exist.
            if (!CustomerListBox.Items.Contains(item))
            {
                CustomerListBox.Items.Add(item);
            }
        }
    }
}
Partial Class DefaultVB
    Inherits System.Web.UI.Page

    Public Sub ItemDetailsView_ItemCommand(ByVal sender As Object, ByVal e As DetailsViewCommandEventArgs)
        ' Use the CommandName property to determine which button
        ' was clicked. 
        If e.CommandName = "Add" Then
        
            ' Add the customer to the customer list. 

            ' Get the row that contains the company name. In this
            ' example, the company name is in the second row (index 1)  
            ' of the DetailsView control.
            Dim row As DetailsViewRow = ItemDetailsView.Rows(1)

            ' Get the company's name from the appropriate cell.
            ' In this example, the company name is in the second cell  
            ' (index 1) of the row.
            Dim name As String = row.Cells(1).Text

            ' Create a ListItem object with the company name.
            Dim item As ListItem = New ListItem(name)

            ' Add the ListItem object to the ListBox control, if the 
            ' item does not already exist.
            If Not CustomerListBox.Items.Contains(item) Then
                CustomerListBox.Items.Add(item)
            End If
        End If
    End Sub

End Class

Poznámky

Ovládací DetailsView prvek vyvolá ItemCommand událost, když kliknete na tlačítko v ButtonFieldpoli řádku , CommandFieldnebo TemplateField . To vám umožní poskytnout obslužnou rutinu události, která provádí vlastní rutinu při každém výskytu této události.

Poznámka

Ovládací DetailsView prvek také vyvolá další specializované události při kliknutí na určitá tlačítka (tlačítka s vlastností nastavenou CommandName na "Delete", "Insert", "Page" nebo "Update"). Při použití některého z těchto tlačítek byste měli zvážit použití některé ze specializovaných událostí poskytovaných ovládacím prvku (například ItemDeleted nebo ItemDeleting).

Objekt DetailsViewCommandEventArgs je předán obslužné rutině události. Pokud má tlačítko, které vyvolalo událost, název příkazu nebo hodnotu argumentu příkazu, můžete tyto hodnoty určit pomocí objektu DetailsViewCommandEventArgs . Pokud chcete určit název příkazu a argument příkazu klikaného tlačítka, použijte CommandName vlastnosti a CommandArgument . Pomocí vlastnosti můžete také získat přístup k ovládacímu DetailsView prvku, který událost CommandSource vyvolal.

Seznam počátečních hodnot vlastností pro instanci DetailsViewCommandEventArgs třídy naleznete v konstruktoru DetailsViewCommandEventArgs .

Konstruktory

DetailsViewCommandEventArgs(Object, CommandEventArgs)

Inicializuje novou instanci DetailsViewCommandEventArgs třídy.

Vlastnosti

CommandArgument

Získá argument pro příkaz.

(Zděděno od CommandEventArgs)
CommandName

Získá název příkazu.

(Zděděno od CommandEventArgs)
CommandSource

Získá zdroj příkazu.

Handled

Získá nebo nastaví hodnotu, která označuje, zda ovládací prvek zpracoval událost.

Metody

Equals(Object)

Určí, zda se zadaný objekt rovná aktuálnímu objektu.

(Zděděno od Object)
GetHashCode()

Slouží jako výchozí hashovací funkce.

(Zděděno od Object)
GetType()

Získá aktuální Type instanci.

(Zděděno od Object)
MemberwiseClone()

Vytvoří mělkou kopii aktuálního Objectsouboru .

(Zděděno od Object)
ToString()

Vrátí řetězec, který představuje aktuální objekt.

(Zděděno od Object)

Platí pro

Viz také