为什么 ASP.NET 找不到我的文本框？
我正在尝试向 CreateUserWizardStep 添加更多字段，这是我添加的内容：
<asp:CreateUserWizardStep ID="CreateUserWizardStep1" runat="server">
<ContentTemplate>
<table border="0">
<tr>
<td align="right">
<asp:Label ID="NickNameLabel" runat="server" AssociatedControlID="NickName">Nick Name:</asp:Label>
</td>
<td>
<asp:TextBox ID="NickName" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="NickName"
ErrorMessage="Nick Name is required." ToolTip="Nick Name is required." ValidationGroup="CreateUserWizard1">*</asp:RequiredFieldValidator>
</td>
</tr>
<%-- The default code is left unchanged, but not shown here --%>
</table>
</ContentTemplate>
</asp:CreateUserWizardStep>
然后我尝试引用这样的对象
protected void NewUserWizard_CreatedUser(object sender, EventArgs e)
{
CreateUserWizardStep step = NewUserWizard.FindControl("CreateUserWizardStep1") as CreateUserWizardStep;
TextBox nickName = step.FindControl("NickName") as TextBox;
// insert additional information to the database
}
问题是，我得到的 nickName 为空代码>.我是否错误地使用了 FindControl("")？
I'm trying to add more fields to the CreateUserWizardStep, here is what I added:
<asp:CreateUserWizardStep ID="CreateUserWizardStep1" runat="server">
<ContentTemplate>
<table border="0">
<tr>
<td align="right">
<asp:Label ID="NickNameLabel" runat="server" AssociatedControlID="NickName">Nick Name:</asp:Label>
</td>
<td>
<asp:TextBox ID="NickName" runat="server"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="NickName"
ErrorMessage="Nick Name is required." ToolTip="Nick Name is required." ValidationGroup="CreateUserWizard1">*</asp:RequiredFieldValidator>
</td>
</tr>
<%-- The default code is left unchanged, but not shown here --%>
</table>
</ContentTemplate>
</asp:CreateUserWizardStep>
Then I tried to reference the objects like this
protected void NewUserWizard_CreatedUser(object sender, EventArgs e)
{
CreateUserWizardStep step = NewUserWizard.FindControl("CreateUserWizardStep1") as CreateUserWizardStep;
TextBox nickName = step.FindControl("NickName") as TextBox;
// insert additional information to the database
}
The problem is, I'm getting nulls for nickName. Am I using FindControl("") incorrectly?
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评论（3）
您可能想使用递归查找控制功能，如下所示： http://stevesmithblog.com/blog /递归查找控制/
you may want to use a recursive find control function such as here: http://stevesmithblog.com/blog/recursive-findcontrol/
FindControl仅即它只检查当前容器的直接子容器。
您可以使用
Controls属性返回step的所有子级：并枚举此查找文本框。
FindControlonlyi.e. It only checks the current containers direct children.
You can use the
Controlsproperty to return all the children ofstep:and enumerate over this looking for your text box.
我自己不知道该控件，但是 CreateUserWizardStep1.NickNameLabel 不起作用吗？
I don't know the control myself, but doesn't CreateUserWizardStep1.NickNameLabel work?