C# 为什么我不能在ListView中选择项目？_C#_Asp.net_Listview

C# 为什么我不能在ListView中选择项目？

c# asp.net listview

C# 为什么我不能在ListView中选择项目？,c#,asp.net,listview,C#,Asp.net,Listview,我有一个带有MS Access数据源的ListView控件，现在我想从ListView中选择一个项目，数据将显示在文本框中，等等如何在列表视图中选择项目？您的问题有点让人困惑。您是否询问在选择列表项时如何调用方法谷歌搜索后应该有很多答案，但这里有一个简单的例子：更改了OnSelectedIndex的ASP.NET列表框： <asp:ListBox runat="server" ID="lbListBox" OnSelectedIndexChanged="lbListBox_OnInd

我有一个带有MS Access数据源的ListView控件，现在我想从ListView中选择一个项目，数据将显示在文本框中，等等

如何在列表视图中选择项目？

您的问题有点让人困惑。您是否询问在选择列表项时如何调用方法

谷歌搜索后应该有很多答案，但这里有一个简单的例子：

更改了OnSelectedIndex的ASP.NET列表框：

<asp:ListBox runat="server" ID="lbListBox" OnSelectedIndexChanged="lbListBox_OnIndexChanged"/>

请尝试…请更改数据提供程序名称和连接字符串属性

<%@ 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></title>
</head>
<body>
   <form id="form1" runat="server">
   <div>
    <asp:ListView ID="ListView1" runat="server" DataKeyNames="PId" OnSelectedIndexChanging="ListView1_SelectedIndexChanging">
        <LayoutTemplate>
            <table>
                <tr>
                    <th>
                        Select
                    </th>
                    <th>
                        Product ID
                    </th>
                    <th>
                        Product Name
                    </th>
                    <th>
                        Unit Price
                    </th>
                </tr>
                <tbody>
                    <asp:PlaceHolder ID="itemPlaceHolder" runat="server" />
                </tbody>
            </table>
        </LayoutTemplate>
        <ItemTemplate>
            <tr>
                <td>
                    <asp:LinkButton ID="lnkSelect" Text="Select" CommandName="Select" runat="server" />
                </td>
                <td>
                    <%# Eval("ProductID")%>
                </td>
                <td>
                    <%# Eval("ProductName")%>
                </td>
                <td>
                    <%# Eval("UnitPrice")%>
                </td>
            </tr>
        </ItemTemplate>
        <SelectedItemTemplate>
            <tr>
                <td>
                    <asp:LinkButton ID="SelectLinkButton" Text="Select" CommandName="Select" runat="server"
                        ForeColor="White" />
                </td>
                <td>
                    <%# Eval("PId")%>
                </td>
                <td>
                    <%# Eval("PName")%>
                </td>
                <td>
                    <%# Eval("Price")%>
                </td>
            </tr>
        </SelectedItemTemplate>
    </asp:ListView>
    <br />
    <asp:Label ID="MessageLabel" runat="server" Text="Label"></asp:Label>
</div>
</form>

在列表视图中，我无法选择项目。。。当我将鼠标指针定位到列表视图而不是列表框时，鼠标指针是一个文本选择，先生。在这种情况下，我会在ListView中添加一个额外的链接按钮：并在CodeBehind中添加一个新方法：protected void lkbCallMethod_Clickobject sender，EventArgs e{/*TODO*/}

protected void lbListBox_OnIndexChanged(object sender, EventArgs e)
{
    var listBoxText = lbListBox.SelectedItem.ToString();
    tbTextBox.Text = listBoxText;
}

<%@ 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></title>
</head>
<body>
   <form id="form1" runat="server">
   <div>
    <asp:ListView ID="ListView1" runat="server" DataKeyNames="PId" OnSelectedIndexChanging="ListView1_SelectedIndexChanging">
        <LayoutTemplate>
            <table>
                <tr>
                    <th>
                        Select
                    </th>
                    <th>
                        Product ID
                    </th>
                    <th>
                        Product Name
                    </th>
                    <th>
                        Unit Price
                    </th>
                </tr>
                <tbody>
                    <asp:PlaceHolder ID="itemPlaceHolder" runat="server" />
                </tbody>
            </table>
        </LayoutTemplate>
        <ItemTemplate>
            <tr>
                <td>
                    <asp:LinkButton ID="lnkSelect" Text="Select" CommandName="Select" runat="server" />
                </td>
                <td>
                    <%# Eval("ProductID")%>
                </td>
                <td>
                    <%# Eval("ProductName")%>
                </td>
                <td>
                    <%# Eval("UnitPrice")%>
                </td>
            </tr>
        </ItemTemplate>
        <SelectedItemTemplate>
            <tr>
                <td>
                    <asp:LinkButton ID="SelectLinkButton" Text="Select" CommandName="Select" runat="server"
                        ForeColor="White" />
                </td>
                <td>
                    <%# Eval("PId")%>
                </td>
                <td>
                    <%# Eval("PName")%>
                </td>
                <td>
                    <%# Eval("Price")%>
                </td>
            </tr>
        </SelectedItemTemplate>
    </asp:ListView>
    <br />
    <asp:Label ID="MessageLabel" runat="server" Text="Label"></asp:Label>
</div>
</form>

using System;
using System.Collections.Generic;
using System.Linq; 
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Data;

public partial class _Default : System.Web.UI.Page
{
   protected void Page_Load(object sender, EventArgs e)
   {
       if (!Page.IsPostBack)
       {
          BindData();
       }
   }
   private void BindData()
   {
    string constr = "Data Source=Your Server;Database=Your DB;uid=User Name; pwd=Your Password;";
    string query = "SELECT PId, PName,Price FROM tblProducts";

    SqlDataAdapter da = new SqlDataAdapter(query, constr);
    DataTable table = new DataTable();

    da.Fill(table);

    ListView1.DataSource = table;
    ListView1.DataBind();
}

 protected void ListView1_SelectedIndexChanging(object sender, ListViewSelectEventArgs e)
 {
    ListView1.SelectedIndex = e.NewSelectedIndex;
    string pid = ListView1.SelectedDataKey.Value.ToString(); 
    MessageLabel.Text = "Selected Product ID: " + pid;
    BindData();
 }
}