Question

我正在从列表视图中删除单个数据库记录，删除后我尝试使用listView1.selectedindex属性在listview中导航，但我注意到它突出显示了错误的记录（例如我将listView1.selectedindex设置为1但它显示的索引为0）。怎么了？请帮忙！

protected void deleteButton_Click(object sender, EventArgs e)
{
    int id = int.Parse(((Label)ListView1.Items[ListView1.SelectedIndex].FindControl("idLabel")).Text);

    using (SqlConnection conn = new SqlConnection(connStr))
    {
        string Sql = "delete from Employee where id = @id";
        conn.Open();
        using (SqlCommand dCmd = new SqlCommand(Sql, conn))
        {
            dCmd.Parameters.AddWithValue("@id", id);
            dCmd.ExecuteNonQuery();
        }
        conn.Close();
    }
    BindDataFromBaseToListView();
}

BindDataFromBaseToListView方法看起来如此：

private void BindDataFromBaseToListView()
{
    using (SqlConnection conn = new SqlConnection(connStr))
    {
        conn.Open();
        using (SqlDataAdapter dAd = new SqlDataAdapter("select * from Employee", conn))
        {
            DataTable dTable = new DataTable();
            dAd.Fill(dTable); 

            ListView1.DataSourceID = null;
            ListView1.DataSource = dTable;
            ListView1.DataBind();
        }
        conn.Close();
  }

Answer 1

您可以使用ListView的deleteButton_Click事件来获取所选的行值，而不是使用OnItemCommand事件，并删除您想要的项目，如下面的代码：

protected void ListView1_ItemCommand(object sender, ListViewCommandEventArgs e)
{
    if (e.CommandName == "delete")
    {
        int id = 0;
        if(int.TryParse((e.Item.FindControl("idLabel") as Label).Text, out id))
        {
            using (SqlConnection conn = new SqlConnection(connStr))
            {
                string Sql = "delete from Employee where id = @id";
                conn.Open();
                using (SqlCommand dCmd = new SqlCommand(Sql, conn))
                {
                    dCmd.Parameters.AddWithValue("@id", id);
                    dCmd.ExecuteNonQuery();
                }
                conn.Close();
            }
            BindDataFromBaseToListView();
        }
    }
}

在你的控制元素上看起来像这样：

<asp:ListView ID="ListView1" runat="server" OnItemCommand="ListView1_ItemCommand" .. >
     ...
     <ItemTemplate>
         <asp:Button runat="server" CommandName="delete" Text="Delete" ID="DeleteButton" />

     ...

如果您仍然遇到问题，请告诉我。

ASP.NET Listview.selectedindex属性变得疯狂

1 个答案: