用于c＃asp.net中客户端的文本框验证 [英] for textbox validation at client side in c# asp.net

问题描述

问题依赖于javascript。



我有用户控制表单和aspx表单，如果在user-controland中有4个文本框我想查看空白从aspx表格验证文本框，其中c＃asp.net中有一个按钮



onclientclick



plz尽快回复

the question is releted to javascript.

I have user-control form and aspx form, if there are 4 textbox in user-controland i want to check blank validation of textbox from aspx form where there is an one button in c# asp.net

onclientclick

plz reply as soon as possible

推荐答案

假设我们创建的用户控件只有一个名为'txt'的asp：文本框，我们必须在页面中验证它。

Suppose we create a user control that has only asp:text box named 'txt', and we have to validate it in our page.

<myText:Textbox ID="txt" runat="server" Visible="true"  />
    <asp:Button ID="btnSumbit" runat="server" Text="Validate user control" OnClientClick="javascritp:return IsFilled()" />

您可以使用以下JavaScript来获得该控制权。

You can use the following JavaScript to get that control.

var a=document.getElementById('form1').elements("txt

txt ）;
if （a.value == ' '）
{
alert（ 请输入值 ）;
return false;
}

txt"); if(a.value=='') { alert("please enter value"); return false; }

问候

Regards

在客户端验证内容是个坏主意。如果有人在浏览器中禁用JavaScript，则您不再验证文本框。所以，总是在服务器端验证内容！



在这种情况下，使用 RequiredFieldValidator ，这是服务器-side：

http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.requiredfieldvalidator%28v=vs.110%29.aspx [ ^ ]

http://asp.net-tutorials.com/validation / required-field-validator / [ ^ ]

http://www.devmanuals.com/教程/ MS / aspdotnet / requiredfieldvalidator.html [< a href =http://www.devmanuals.com/tutorials/ms/aspdotnet/requiredfieldvalidator.html\"target =_ blanktitle =New Window> ^ ]

Hi,

It's a bad idea to validate stuff at client-side. If someone disables JavaScript in his browser, then you don't longer validate the text box. So, ALWAYS validate stuff at server-side!

In this case, use a RequiredFieldValidator, which is server-side:
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.requiredfieldvalidator%28v=vs.110%29.aspx[^]
http://asp.net-tutorials.com/validation/required-field-validator/[^]
http://www.devmanuals.com/tutorials/ms/aspdotnet/requiredfieldvalidator.html[^]

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