如何在FormView中从隐藏代码给隐藏文件赋值 [英] How to give value to hiddenfiled from codebehind in formview

问题描述

你好先生，

我正在尝试从代码隐藏中为hiddenfield赋予价值.这是我的代码:

hello sir,

i am trying to give value to hiddenfield from codebehind. here is my code:

HiddenField hf = (HiddenField)FormView1.FindControl("hdnvideo");
               hf.Value = "123";

我需要将"123"传递给hdnvideo类型hiddenfield.
当前会将值传递给hf类型hiddenfield.

请帮助我:

thanx

I need to pass the "123" to hdnvideo type hiddenfield.
it''s currently passing the value to hf type hiddenfield.

please help me on this:

thanx

推荐答案

我有几个问题要问你

1.您的表格是否包含在母版页中?
2.如果是这样，我希望ForView在ContentPlaceHolder上.对吗?

如果是，请继续阅读.

当控件驻留在内容占位符中时，asp.net会自动将ID附加为ctl00.尽管ID为hdnVideo，但运行时它可能会附加ct100并形成ID.我建议您运行页面并从浏览器运行，请单击查看源代码"并查找是否使用ctl00生成了id.我不确定这是否是实际问题.仅是我的建议.

I have a few questions for you

1.Is your form included within master page?
2.If so,I hope ForView is on a ContentPlaceHolder.Is that correct?

If the answer is yes,read further.

When controls reside in a content place holder asp.net automatically appends the IDs with ctl00.Though the id is hdnVideo,run time it might be getting appended with ct100 & forming a id.I would suggest,you run the page & from the browser,click on View Source & find out if an id is generated with ctl00.I am not sure whether this is the actual problem.Just a suggestion from my side.

aspx页面中的代码:

Code in aspx page:

<input type="hidden" name="hdnVideo" value="" ID="someID" runat="server">

背后的代码:

Code behind:

// Simply acccess the hidden field by its name. It is automatically
// declared because of runat="server"
hdnVideo.Value = "123";

最好的问候，
曼弗雷德(Manfred)

Best Regards,
Manfred

我不知道为什么从FormView1中找到.

尝试从Page，Like
找到它

I don''t have any clue why you are finding from FormView1.

Try to find it from Page, Like

HiddenField hdn = (HiddenField)Page.FindControls("hdnVideo");
hdn.Value = "123";

并且确保HiddenField被标记为Runat="Server"

And Make sure that HiddenField is marked Runat="Server"

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