如何获得列表框选定的值 [英] How to get listbox selected value

问题描述

您好，我想通过使用listbox_Indexchanged事件获取列表框选定的值，但是我无法获得选定的索引或选定的值.请帮帮我.

这是我到目前为止编写的代码(dt1是一个DataTable).

Hi Iam trying to get listbox selected value by using thelistbox_Indexchanged event, but I am unable to get the selected index or selected value. Please help me out.

Here''s the code I''ve written so far (dt1 is a DataTable).

protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
    {
        dt1.Clear();
        dt1 = g1.Getusers();
        for (i = 0; i < dt1.Rows.Count; i++)
        {
            if (ListBox1.SelectedValue.ToString() == dt1.Rows[i][1])
            {
                TextBox1.Text = dt1.Rows[i][1].ToString();
                TextBox2.Text = dt1.Rows[i][2].ToString();
                DropDownList1.SelectedValue = dt1.Rows[i][3].ToString();
            }
        }
    }

谢谢.

thanks.

推荐答案

好，您正在比较:
ListBox1.SelectedValue.ToString() == dt1.Rows[i][1]
好像您没有使用DEBUGGER并看到过这些值.在我看来，这种比较是不正确的.

请调试并查看是否选择了这些值.

还有一件事，请确保在此selectedindexchange事件触发之前，不要将LitBox1与数据集重新绑定.

Well, you are comparing:
ListBox1.SelectedValue.ToString() == dt1.Rows[i][1]
Looks like you have not used DEBUGGER and seen the values. it looks to me that the comparison is not correct.

Please debug and see if the values are selected.

One more thing, do make sure that you are not re-binding the LitBox1 with the dataset before this selectedindexchange event fires.

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