为什么文本框的ontextchanged事件在回发后不起作用 [英] Why ontextchanged event of textbox isnot working after postback

问题描述

文本框的为什么ontextchanged事件状态并没有回发后



工作<预LANG = XML> <跨度类= 代码关键字>< <跨度类= 代码leadattribute> DIV <跨度类= 代码属性> <跨度类= 代码属性>类 <跨度类= code-keyword> = col-md-6 >

<跨度类= 代码关键字>< <跨度类= 代码leadattribute> ASP：文本框 <跨度类= 代码属性> ID = txtname runat = server class = form-control

< span class =code-attribute> meta：resourcekey = txtnameResource1 AutoPostBack = True ontextchanged = txtname_changed > < / asp：TextBox >
< asp：RequiredFieldValidator ID = ReqName runat = server

ControlToValidate = txtname 显示 = 动态

ErrorMessage = 请输入名称

meta：resourcekey = RequiredFieldValidator3Resource1 > < / asp：RequiredFieldValidator >
< / div >

 < span class =code-keyword> protected   void  t xtname_changed（ object  sender，EventArgs e）
 {
  int  Count = m。 bussinesCollection.SubscriptionKindBL.GetSubscriptionkindbyname（txtname.Text.ToString（））; 
 
  if （Count！=  0 ）
 {
 lblmessage.Visible =  true ; 
 lblmessage.Text =  用户名已存在; 
 
} 
  else  
 {
 lblmessage.Visible = 假; 
 m.bussinesCollection.SubscriptionKindBL.Name = txtname.Text; 
 
} 
} 

我的代码工作正常，但在调试过程中我发现，当我在文本框中更改值时，如果它是re​​patly来，那么vaLUE就不能改变。



和没有页面刷新我就无法输入新值。



Ex。假设我在这个文本框中输入Asp.net，如果asp.net已经输入意味着它存在于数据库中，则显示labelmsg。但是当我尝试更改此值时，我发现如果我输入任何值，如abcd那么textbox的值重复成为Asp.net，直到我没有翻页。



任何人都可以给我解决方案。



提前致谢。

解决方案

显示错误消息&如果您想显示输入的文本值，请在错误消息中显示它，例如

 lblmessage.Text =  '您输入的文字'已存在; 

将文本框的属性更改为enableViewState = false并且AutoPostback = true

尝试在另一个页面上单独实现此功能，如果有效，则原始页面中的其他因素可能会影响功能。因为当我这样做时，我没有找到这种类型的问题。

Why ontextchanged event of textbox isnot working after postback

<div class="col-md-6">

                                <asp:TextBox ID="txtname" runat="server" class="form-control"

                            meta:resourcekey="txtnameResource1" AutoPostBack="True" ontextchanged="txtname_changed"></asp:TextBox>
                        <asp:RequiredFieldValidator ID="ReqName" runat="server"

                    ControlToValidate="txtname" Display="Dynamic"

                    ErrorMessage="Please Enter Name"

                            meta:resourcekey="RequiredFieldValidator3Resource1"></asp:RequiredFieldValidator>
                    </div>

protected void txtname_changed(object sender, EventArgs e)
       {
           int Count = m.bussinesCollection.SubscriptionKindBL.GetSubscriptionkindbyname(txtname.Text.ToString());

           if (Count != 0)
           {
               lblmessage.Visible = true;
               lblmessage.Text = "User Name is Already Exist";

           }
           else
           {
               lblmessage.Visible = false;
               m.bussinesCollection.SubscriptionKindBL.Name = txtname.Text;

           }
       }

my code works fine but during debugging i found that,when i change value in textbox if it is repatly come then that vaLUE CAN'T CHANGE.

and i can't enter new value without page refresh.

Ex. suppose i enter Asp.net in this textbox,if asp.net is already enter means it is exist in database,then labelmsg is shown.but when i try to change this value i found that if i enter any value like abcd then textbox's value become Asp.net repeatly till i not page refresh.

can anyone give me solution for that.?

Thanks in advance.

解决方案

Make Text Box blank after showing error message & if u want to show entered text value also then make it visible in your error message like

lblmessage.Text = "'Your entered text' is Already Exist";

Change the property of your text box to enableViewState=false and AutoPostback=true

try to implement this separately on another page,if works then may other factors from original page are affecting functionality. Because when i done this, i not found such type of issue.

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