使用 Repeater 实现可更新的表单
我有一个参数名称列表,我希望用户输入一些值,所以我这样做:
<div>
<asp:Repeater runat="server" ID="rptTemplateParams" EnableViewState="true">
<HeaderTemplate>
<ul>
</HeaderTemplate>
<ItemTemplate>
<li>
<asp:Label runat="server"><%#Container.DataItem%></asp:Label>
<asp:TextBox runat="server" ID="textParamValue"></asp:TextBox>
</li>
</ItemTemplate>
<FooterTemplate>
</ul>
</FooterTemplate>
</asp:Repeater>
</div>
<asp:Button runat="server" ID="Send" Text="Send Email" OnClick="Send_Click" />
在服务器端:
void Page_Load(...)
{
rptTemplateParams.DataSource =Params; // Params is List<string>
rptTemplateParams.DataBind();
}
public void Send_Click(object sender, EventArgs e)
{
ParamDict = new Dictionary<string, string>();
foreach (RepeaterItem item in rptTemplateParams.Items)
{
if (item.ItemType == ListItemType.Item)
{
TextBox textParamValue = (TextBox)item.FindControl("textParamValue");
if (textParamValue.Text.Trim() != String.Empty)
{
// IT NEVER GETS HERE - textParamValue.Text IS ALWAYS EMPTY!!!
ParamDict.Add(item.DataItem.ToString(), textParamValue.Text);
}
}
}
}
当我输入注释时,我无法检索文本框值 - 它们始终为空。我是否在错误的地方检索它们?
谢谢! 安德烈
I have a list of parameter names for which I want a user to type in some values, so I do this:
<div>
<asp:Repeater runat="server" ID="rptTemplateParams" EnableViewState="true">
<HeaderTemplate>
<ul>
</HeaderTemplate>
<ItemTemplate>
<li>
<asp:Label runat="server"><%#Container.DataItem%></asp:Label>
<asp:TextBox runat="server" ID="textParamValue"></asp:TextBox>
</li>
</ItemTemplate>
<FooterTemplate>
</ul>
</FooterTemplate>
</asp:Repeater>
</div>
<asp:Button runat="server" ID="Send" Text="Send Email" OnClick="Send_Click" />
and on server side:
void Page_Load(...)
{
rptTemplateParams.DataSource =Params; // Params is List<string>
rptTemplateParams.DataBind();
}
public void Send_Click(object sender, EventArgs e)
{
ParamDict = new Dictionary<string, string>();
foreach (RepeaterItem item in rptTemplateParams.Items)
{
if (item.ItemType == ListItemType.Item)
{
TextBox textParamValue = (TextBox)item.FindControl("textParamValue");
if (textParamValue.Text.Trim() != String.Empty)
{
// IT NEVER GETS HERE - textParamValue.Text IS ALWAYS EMPTY!!!
ParamDict.Add(item.DataItem.ToString(), textParamValue.Text);
}
}
}
}
As I put in the comment, i can't retrieve text box values - they are always empty. Am I retrieving those in the wrong place?
Thanks!
Andrey
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尝试像这样修改您的 page_load
数据绑定会清除现有控件并用新的空白控件替换它们。您只想在必要时进行数据绑定。
Try modifying your page_load like this
The databinding wipes out existing controls and replaces them with new blank controls. You only want to databind when necessary.
试试这个:
try this: