我正在尝试向eventHandler
添加另一个RadioButton
。这是示例代码(正在运行):
ASP.NET:
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
<asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>
<asp:Button ID="Button1" runat="server" Text="Button" />
C#:
protected void Page_Load(object sender, EventArgs e)
{
RadioButton RB1 = new RadioButton();
RB1.ID = "1";
RB1.GroupName = "bla";
RB1.CheckedChanged += new EventHandler(CheckedChanged);
RadioButton RB2 = new RadioButton();
RB2.ID = "2";
RB2.GroupName = "bla";
RB2.CheckedChanged += new EventHandler(CheckedChanged);
PlaceHolder1.Controls.Add(RB1);
PlaceHolder1.Controls.Add(RB2);
}
protected void CheckedChanged(object sender, EventArgs e)
{
Label1.Text = ((RadioButton)sender).ID;
}
在我的项目中,我动态创建了RadioButtons
(从数据库中获取的行数)。相同的添加eventHandler
不起作用,但如果我写
MyRadioButton.Load += new EventHandler(Another_method);
Another_method
将开始,但在
MyRadioButton.CheckedChanged += new EventHandler(Main_method);
如果我选择其中一个Main_method
,RadioButtons
将无法启动。
有什么问题?
@KevinP 这是我的代码:
Table tb1 = new Table();
PlaceHolder1.Controls.Add(tb1);
TableRow tr = new TableRow();
TableCell tc = new TableCell();
//adding the first row with title"
tr.Cells.Add(tc);
for (int i = 0; i < ((ArrayList)(result[0])).Count; i++)
{
tc = new TableCell();
Label example = new Label();
example.Text = ((columnsResultFromSqlClients)(i)).ToString();
tc.Controls.Add(example);
tr.Cells.Add(tc);
}
tb1.Rows.Add(tr);
//filling the table
for (int i = 0; i < result.Count; i++)
{
tr = new TableRow();
tc = new TableCell();
//adding radio button
RadioButton RB = new RadioButton();
RB.Attributes.Add("value", ((ArrayList)(result[i]))[0].ToString());
RB.GroupName = "for_selecting";
RB.ID = ((ArrayList)(result[i]))[0].ToString();
RB.CheckedChanged += new EventHandler(RB_CheckedChanged2);
//RB.AutoPostBack = true;
RB.Attributes.Add("AutoPostBack", "True");
tc.Controls.Add(RB);
tr.Cells.Add(tc);
//adding content
for (int j = 0; j < ((ArrayList)(result[i])).Count; j++)
{
tc = new TableCell();
Label example = new Label();
example.Text = ((ArrayList)(result[i]))[j].ToString();
tc.Controls.Add(example);
tr.Cells.Add(tc);
}
tb1.Rows.Add(tr);
}
如果我使用RB.AutoPostBack = true;
,我没有时间按下按钮提交我的选择,因为当我点击其中一个单选按钮时页面将重新加载。
还有RB_CheckedChanged2
代码:
protected void RB_CheckedChanged2(object sender, EventArgs e)
{
RadioButton tempRB = (RadioButton)sender;
if (tempRB.Checked)
{
selected_id = tempRB.ID;
}
}
select_id
是static int
变量,标准值=“ - 1”。
答案 0 :(得分:1)
如果我没弄错,使用ASP.Net中的动态控件,你需要在回发中“重新连接”他们的事件。请记住,在回发中,动态控件不再存在。你必须重新创建它们。