RadioButtonList：OnSelectedIndexChanged 未触发

Question

我有一个 aspx 页面，我在其中动态添加带有 OnSelectedIndexChanged 事件的单选按钮列表。 如果我检查所选项目。 我有 2 件物品。

对于第一项，事件触发良好，但是如果我选择其他选项，则事件不会触发：在代码下方..

该事件仅在我从“提供的一些”更改为“提供的所有”的其他方式不起作用时才触发

添加 RBL：

                RadioButtonList dControl_b = new RadioButtonList();
                dControl_b.ID = "rbl_MinCriteria";
                dControl_b.RepeatDirection = System.Web.UI.WebControls.RepeatDirection.Horizontal;
                dControl_b.CssClass = "Font";
                dControl_b.Font.Name = "Arial";
                dControl_b.Font.Size = 8;
                dControl_b.ToolTip = "";
                dControl_b.SelectedIndex = -1;
                dControl_b.SelectedIndexChanged += new EventHandler(rbl_MinCriteria_SelectedIndexChanged);
                dControl_b.AutoPostBack = true;

检查所选项目：

   if(rbl_MinCriteria.SelectedItem.ToString() == "All provided")
   {
       cbl_MinimumCriteria.Items[0].Selected = true;
       cbl_MinimumCriteria.Items[1].Selected = true;
       cbl_MinimumCriteria.Items[2].Selected = true;
       cbl_MinimumCriteria.Items[3].Selected = true;
       cbl_MinimumCriteria.Enabled = false;

       //*************************************************************
       if (ddl_CountryOccurence.SelectedValue != "Please choose")
       {
           ddl_CountryOccurence.Enabled = false;
       }
       else
       {
           ddl_CountryOccurence.Enabled = true;
       }

       //*************************************************************
       if (tb_DueDate.Text != "")
       {
           tb_DueDate.Enabled = false;
       }
       else
       {
           tb_DueDate.Enabled = true;
       }

       OtherControlI.Enabled = false;
       OtherControlII.Enabled = false;
       OtherControlIII.Enabled = false;
   }
   if (rbl_MinCriteria.SelectedItem.ToString() == "Some provided")
   {
       cbl_MinimumCriteria.Items[0].Selected = false;
       cbl_MinimumCriteria.Items[1].Selected = false;
       cbl_MinimumCriteria.Items[2].Selected = false;
       cbl_MinimumCriteria.Items[3].Selected = false;
       cbl_MinimumCriteria.Enabled = true;

       //*************************************************************
       if (ddl_CountryOccurence.SelectedValue != "Please choose")
       {
           ddl_CountryOccurence.Enabled = false;
       }
       else
       {
           ddl_CountryOccurence.Enabled = true;
       }

       //*************************************************************
       if (tb_DueDate.Text != "")
       {
           tb_DueDate.Enabled = false;
       }
       else
       {
           tb_DueDate.Enabled = true;
       }

       OtherControlI.Enabled = false;
       OtherControlI.SelectedIndex = -1;
       OtherControlII.Enabled = false;
       OtherControlII.SelectedIndex = -1;
       OtherControlIII.Enabled = false;
       OtherControlIII.SelectedIndex = -1;
   }

非常感谢任何帮助和评论

Answer 1

这适用于从 Google 找到此问题的人：

在RadioButtonList上，将AutoPostBack属性设置为true 。

RadioButtonList OnSelectedIndexChanged

Answer 2

我有这个问题并解决了。

要引发 RadioButtonList 的 onselectedindexchanged 事件，请检查以下项目：

       <asp:RadioButtonList ID="rdlCondition" runat="server" AutoPostBack="True" 
        onselectedindexchanged="rdlCondition_SelectedIndexChanged">

并在 Page_Load 中用代码设置它们：

     rdlCondition.AutoPostBack = true;
     rdlCondition.SelectedIndexChanged += new EventHandler (rdlCondition_SelectedIndexChanged);

Answer 3

我制作了一个示例aspx页面，并在.aspx中添加了一个面板，如下所示：

<asp:Panel ID="Panel1" runat="server"></asp:Panel>

在后面的代码中，我添加了以下代码：

protected void Page_Load(object sender, EventArgs e)
    {
        RadioButtonList dControl_b = new RadioButtonList();
        dControl_b.ID = "rbl_MinCriteria";
        dControl_b.RepeatDirection = System.Web.UI.WebControls.RepeatDirection.Horizontal;
        dControl_b.CssClass = "Font";
        dControl_b.Font.Name = "Arial";
        dControl_b.Font.Size = 8;
        dControl_b.ToolTip = "";
        dControl_b.SelectedIndex = -1;
        dControl_b.SelectedIndexChanged += new          EventHandler(rbl_MinCriteria_SelectedIndexChanged);
        dControl_b.AutoPostBack = true;

        dControl_b.Items.Add(new ListItem("All provided"));
        dControl_b.Items.Add(new ListItem("Some provided"));

        Panel1.Controls.Add(dControl_b);
    }
    protected void rbl_MinCriteria_SelectedIndexChanged(object sender,EventArgs e)
    {
        RadioButtonList rbl_MinCriteria = (RadioButtonList)Panel1.FindControl("rbl_MinCriteria");
       if(rbl_MinCriteria.SelectedItem.ToString() == "All provided")
       {

       }
       if (rbl_MinCriteria.SelectedItem.ToString() == "Some provided")
       {

       }

    }

listitem更改单选按钮列表项时，事件都会触发。

所以，恐怕你在别处做错了什么。 祝你好运。

Answer 4

查看上面的代码似乎有很多代码重用。 我重新组织了您的代码（假设您没有遗漏任何内容）。 请记住，我从未测试过它。

protected void rbl_MinCriteria_SelectedIndexChanged(object sender,EventArgs e)
{
   if (rbl_MinCriteria.SelectedIndex<0) return; //If nothing is selected then do nothing

       OtherControlI.Enabled = false;
       OtherControlII.Enabled = false;
       OtherControlIII.Enabled = false;
   if(rbl_MinCriteria.SelectedItem.ToString() == "All provided")
   {
       cbl_MinimumCriteria.Items[0].Selected = true;
       cbl_MinimumCriteria.Items[1].Selected = true;
       cbl_MinimumCriteria.Items[2].Selected = true;
       cbl_MinimumCriteria.Items[3].Selected = true;
       cbl_MinimumCriteria.Enabled = false;

   }
   if (rbl_MinCriteria.SelectedItem.ToString() == "Some provided")
   {
       cbl_MinimumCriteria.Items[0].Selected = false;
       cbl_MinimumCriteria.Items[1].Selected = false;
       cbl_MinimumCriteria.Items[2].Selected = false;
       cbl_MinimumCriteria.Items[3].Selected = false;
       cbl_MinimumCriteria.Enabled = true;

       OtherControlI.SelectedIndex = -1;
       OtherControlII.SelectedIndex = -1;
       OtherControlIII.SelectedIndex = -1;
   }

   //*************************************************************
   if (ddl_CountryOccurence.SelectedValue != "Please choose")
   {
       ddl_CountryOccurence.Enabled = false;
   }
   else
   {
       ddl_CountryOccurence.Enabled = true;
   }
   //*************************************************************
   if (tb_DueDate.Text != "")
   {
     tb_DueDate.Enabled = false;
   }
   else
   {
       tb_DueDate.Enabled = true;
   }
}

我知道这对您当前的问题没有帮助，但这只是一个建议。 如果您可以将代码发布到您实际将值添加到列表中的位置，我可以提供更多帮助。

编辑：您的问题可能是您没有设置项目的价值，只有文本。 尝试使用rbl_MinCriteria.SelectedItem.Text =="All provided"代替。