Asp.net ListBox填充探针 [英] Asp.net ListBox Filling Probelm

问题描述

protected void lstActivity_SelectedIndexChanged(object sender, EventArgs e)
    {
        listview();
    }

public void listview()
    {
        try
        {
            string company = lstActivity.SelectedItem.Text;
            reader = obj.SelCommand("Select activity from tbl_activity where company_id=(select id from tbl_company where company_name='" + company + "') and department=(select dept from tbl_login where username='" + lbluser.Text + "')");
            lstCompany.Items.Clear();
            while (reader.Read())
            {

                lstCompany.Items.Add(reader["activity"].ToString());

            }
            reader.Close();
        }
        catch (Exception ex)
        {
            Response.Write("Error in page :" + ex.Message);
        }
    }

上面是代码.我用数据库中的值填充了一个列表框.

我有两个列表框-第一个填充页面加载，第二个填充第一个列表框的selectedindexchanged事件.

填充selectedIndexchanged事件的列表框未加载.但是，如果我将它放在按钮单击事件中，它将起作用.

请帮助我用selectedindexchanged event

Above is the code. I filled a listbox with values from database.

I have two listboxes - first one is filling in the pageload and the second is filling on the selectedindexchanged event of first listbox.

The listbox filling in the selectedIndexchanged event is not loading. But, if I put it in a button click event, it works.

Kindly help me to fill it with selectedindexchanged event

推荐答案

设置autopostback property = true

Set autopostback property=true

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