Question

我有列表框控件，我将值绑定到列表框

DataSet ds = new DataSet();
da.Fill(ds, "Employees");
ListBox1.DataSource = ds.Tables["Employees"].DefaultView; 
ListBox1.SelectedIndex = 0;
ListBox1.DataTextField = "FirstName";
ListBox1.DataValueField = "StaffID";
ListBox1.Databind();

选择值后

。一旦用户点击此按钮，我就会有按钮

protected void BtnClick(object sender, EventArgs e)  
  {       
 var selectedItems = (from item in listBox.Items.Cast<ListItem>()     where item.Selected        select item.Text).ToArray();   
     result.Text = "You selected: ";    
   result.Text += string.Join(",", selectedItems); 
   }

现在我在事件内部代码给我选择的vlaues名称。但我想获得所选的值索引前

ID  NAME
23  ram
34 tom
67 john

所以，如果我选择ram和john 在后面的代码中，我需要获得这些值为23,67的vales ID

希望我的问题很清楚

谢谢

Answer 1

要做出这项工作需要做一些小改动

protected void BtnClick(object sender, EventArgs e)
{
var selectedItems = (from item in listBox.Items.Cast() where item.Selected select **item.Value**).ToArray();
result.Text = "You selected: ";
result.Text += string.Join(",", selectedItems);
 }

这一行

var selectedItems = (from item in listBox.Items.Cast() where item.Selected select item.Value).ToArray();

Answer 2

您需要迭代列表框项目，例如..

 foreach (ListItem lstItem in lstProduct.Items)
    {
        if (lstItem.Selected)
        {
        }
    }

在列表框控件中绑定数据并检索所选的值id

2 个答案: