c# - 来自文本框的文本在 gridview 中消失，它来自通过 Radiobuttonlist1.SelectedIndexChanged 的​​单选按钮列表

Question

protected void RadioButtonList1_SelectedIndexChanged(object sender, EventArgs e)
{
    var listControl = (ListControl)sender;
    var row = (GridViewRow)listControl.NamingContainer;
    var value = listControl.SelectedValue;
    var items = listControl.SelectedItem;
    GridView2.Rows[Convert.ToInt16(value) - 1].Cells[3].Text = items;

 }

这是我写的代码..请协助我。如有任何疑虑/问题，请告诉我。

Answer 1

此文本只会在 RadioButtonList1_SelectedIndexChanged 事件触发后出现。当您有任何回发时，此文本将消失，因为此事件不会在控件加载事件中引发。确保文本在用户操作期间始终出现。您可以执行以下操作。

private class SelectedItem
{
    public string Items { get; set; }
    public string Items { get; set; }

}

在 RadioButtonList1_SelectedIndexChanged

protected void RadioButtonList1_SelectedIndexChanged(object sender, EventArgs e)
{
    var listControl = (ListControl)sender;
    var row = (GridViewRow)listControl.NamingContainer;
    var value = listControl.SelectedValue;
    var items = listControl.SelectedItem;
    var selectedItem =new SelectedItem();
    selectedItem.Items = items;
    selectedItem.Value= value;
    // Save the selected item in the session
    Sessions["SelectedItem"] = selectedItem;

 }

然后在页面加载事件中，您可以执行以下操作：

protected void Page_Load(object sender, EventArgs e)
{
   // check is sessiosn is not null or empty

            if(Session["SelectedItem"]!= null)
            {
                var selectedItem = new SelectedItem();
                selectedItem = (SelectedItem)Session["SelectedItem"];
                GridView2.Rows[Convert.ToInt16(selectedItem.Value) - 1].Cells[3].Text = selectedItem.Items;


            }
}

希望这会有所帮助。