更新面板内的文本框仍然刷新整个页面。 [英] Textbox inside update panel is still refreshing whole page.

问题描述

我有一个包含大量控件的页面。当我在文本框中键入时，其格式需要更改为格式化文本。我不希望整个页面被刷新。请看下面我的代码...

这不行...请纠正我...在aspx页面

I have a page with lots of controls . When i type inside a textbox its format need to be changes to a formatted text. i don't want the whole page to be refreshed. please see my code below...
this is not working...please correct me...in aspx page

<asp:UpdatePanel runat="server" UpdateMode="Conditional" ChildrenAsTriggers="false">
                               <ContentTemplate>
                               <fieldset>
                                <asp:TextBox ID="txtContact" runat="server"  ForeColor="#999999"

                                    value="Contact Number" onfocus="if (this.value == 'Contact Number')  {this.value = '';this.style.color  = '#000000';}"



                                    onblur="if(this.value == '') { this.value='Contact Number';this.style.color  ='#999999';}"

                                    Width="165px" AutoPostBack="True" ontextchanged="txtContact_TextChanged" ></asp:TextBox>
                                <asp:RequiredFieldValidator ID="rContact" runat="server"

                                    ControlToValidate="txtContact" CssClass="failureNotification" ValidationGroup="Contact" ErrorMessage="*"></asp:RequiredFieldValidator>
                                </fieldset>
                                </ContentTemplate>
                                   <triggers>
                                    <asp:PostBackTrigger ControlID="txtContact" ></asp:PostBackTrigger>
                                    </triggers>
                           </asp:UpdatePanel>

代码落后（aspx.cs）

code behind (aspx.cs)

protected void txtContact_TextChanged(object sender, EventArgs e)
     {
         try
         {
             if (txtContact.Text != "Contact Number")
             {
                 string x = txtContact.Text;
                 double y = Double.Parse(x);
                 txtContact.Text = String.Format("{0:(###) ###-####}", y);
             }
         }
         catch (Exception ex)
         {
             txtContact.Text = "Contact Number";
         }
     }

仍然整个页面都是refeshing ...后面的代码工作正常

still the whole page is refeshing...code behind is working perfectly

推荐答案

使用AsyncPostBackTrigger而不是PostBackTrigger。

Use AsyncPostBackTrigger instead of PostBackTrigger.

<asp:AsyncPostBackTrigger ControlID="txtContact" EventName="TextChanged" />

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