如何从code dislay验证消息的背后 [英] How to dislay Validation Message from code behind

问题描述

我有一个文本框..
我想验证它是一个基于DropDownList的值值..
所以我从code显示的讯息后面使用 RegularEx pressionValidator ..
但它不工作PLZ，给我的建议。

 ＆LT; ASP：文本框ID =tbnooflecture=服务器WIDTH =119pxHEIGHT =33px＆GT;＆LT; / ASP：文本框＆GT;              ＆LT; ASP：RegularEx pressionValidator ID =RegularEx pressionValidator1前景色=＃6600FF
                =服务器的ValidationGroup =上
                     的ControlToValidate =tbnooflecture＆GT;＆LT; / ASP：RegularEx pressionValidator＆GT;
 ＆LT; ASP：按钮的ID =bfillattendence=服务器文本=，填补考勤点击这里
                            的onclick =FillAttendence_ClickWIDTH =218pxHEIGHT =33px的CausesValidation =真的ValidationGroup =上/＆GT;
 

我写低于code在按钮的Click事件

 字符串batchname = dpbatchname.SelectedItem.Text.ToString（）;
        INT lengthofbatch = batchname.Length;
        如果（lengthofbatch == 2）
        {
            RegularEx pressionValidator1.ValidationEx pression =[1-9] [02468] | [02468];        RegularEx pressionValidator1.ErrorMessage =只有连考勤号是实验室有效。
        }
        否则如果（lengthofbatch == 1）
        {
            RegularEx pressionValidator1.ValidationEx pression =[0-9] [0-9] | [0-9];
            RegularEx pressionValidator1.ErrorMessage =考勤应和9,50一样;
        }
        其他
        {
            RegularEx pressionValidator1.ValidationEx pression =[0-9] [0-9] | [0-9];
            RegularEx pressionValidator1.ErrorMessage =考勤应和9,50一样;
        }
 

解决方案

添加此行
RequiredFieldValidator1.IsValid = FALSE;

在

RegularEx pressionValidator1.ValidationEx pression =[0-9] [0-9] | [0-9];
RegularEx pressionValidator1.ErrorMessage =考勤应和9,50一样;

I have one textbox.. i want to validate it's value based on dropdownlist value.. So i am displaying message from code behind using RegularExpressionValidator.. But it is not working plz,give me suggestion..

<asp:TextBox ID="tbnooflecture" runat="server"  Width="119px" Height="33px"></asp:TextBox>

              <asp:RegularExpressionValidator ID="RegularExpressionValidator1"  ForeColor="#6600FF" 
                runat="server"  ValidationGroup="upper" 
                     ControlToValidate="tbnooflecture"></asp:RegularExpressionValidator>
 <asp:Button ID="bfillattendence" runat="server" Text="To Fill Attendence Click Here"
                            onclick="FillAttendence_Click" Width="218px"  Height="33px" CausesValidation="true" ValidationGroup="upper"/>

i am writing below code in Button click event

string  batchname = dpbatchname.SelectedItem.Text.ToString();
        int lengthofbatch=batchname.Length;
        if(lengthofbatch==2)
        {
            RegularExpressionValidator1.ValidationExpression = "[1-9][02468]|[02468]";

        RegularExpressionValidator1.ErrorMessage = "Only Even No. of Attendence is Valid for Lab.";
        }
        else if (lengthofbatch == 1)
        {
            RegularExpressionValidator1.ValidationExpression = "[0-9][0-9]|[0-9]";
            RegularExpressionValidator1.ErrorMessage = "Attendence Shold be Like 9,50";
        }
        else
        {
            RegularExpressionValidator1.ValidationExpression = "[0-9][0-9]|[0-9]";
            RegularExpressionValidator1.ErrorMessage = "Attendence Shold be Like 9,50";
        }

解决方案

Add this line RequiredFieldValidator1.IsValid = false;

after

RegularExpressionValidator1.ValidationExpression = "[0-9][0-9]|[0-9]"; RegularExpressionValidator1.ErrorMessage = "Attendence Shold be Like 9,50";

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