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在文本框更改文本的UpdatePanel之外

本文介绍了在文本框更改文本的UpdatePanel之外的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有一个UpdatePanel内的GridView（gridview的是显示在一个弹出）。在该网格选择按钮的点击，我想设置页面中的文本框的文本。但它不工作，如果我删除更新面板，然后它会工作。
请帮助。

这是在我的aspx code：

 ＆LT; D​​IV＆GT;＆LT; ASP：文本框ID =TXT=服务器/＆GT;＆LT; / DIV＆GT;
     ＆LT; ASP：的UpdatePanel ID =updLendersearch=服务器的UpdateMode =条件＆GT;
        ＆LT;＆触发器GT;
            ＆LT; ASP：AsyncPostBackTrigger控件ID =btnLenderSearch事件名称=点击/＆GT;
        ＆LT; /触发器＆GT;
        ＆LT;＆的ContentTemplate GT;
        ＆LT; D​​IV ID =divLender=服务器级=white_content的风格=高度：450像素;顶部：20％;宽度：57％;＆GT;
        ＆LT; ASP：标签ID =lblBenificiary=服务器文本=受益人/贷方：FONT-名称=Candara＆GT;＆LT; / ASP：标签＆gt;
        ＆LT; ASP：文本框ID =txtBeneficiaryName风格=边界：1px的红色实心=服务器WIDTH =80px的CssClass =txtboxesFONT-名称=Candara＆GT;＆LT; / ASP：文本框＆GT;
        ＆LT; ASP：的RequiredFieldValidator ID =reqBeneficiaryName=服务器的ErrorMessage =*前景色=红的ControlToValidate =txtBeneficiaryName的ValidationGroup =贷款人＆GT;＆LT; / ASP：＆的RequiredFieldValidator GT;
        ＆LT; ASP：标签ID =lblLenderState=服务器文本=状态：FONT-名称=Candara＆GT;＆LT; / ASP：标签＆gt;
          ＆LT; ASP：DropDownList的ID =ddlLenderState=服务器的AutoPostBack =真正的风格=边界：1px的红色实心
                        AppendDataBoundItems =真的CssClass =drpdownOnSelectedIndexChanged =ddlLenderState_SelectedIndexChanged＆GT;
                    ＆LT; / ASP：DropDownList的＆GT;
                    ＆LT; ASP：的RequiredFieldValidator ID =reqLenderState=服务器的ErrorMessage =*前景色=红的ControlToValidate =ddlLenderState的ValidationGroup =贷款人＆GT;＆LT; / ASP：＆的RequiredFieldValidator GT;
                    ＆LT; ASP：标签ID =lblLenderCity=服务器文本=城市：FONT-名称=Candara＆GT;＆LT; / ASP：标签＆gt;
                      ＆LT; ASP：DropDownList的ID =ddlLenderCity=服务器WIDTH =100像素的AutoPostBack =真
                        AppendDataBoundItems =真的CssClass =drpdownOnSelectedIndexChanged =ddlLenderCity_SelectedIndexChanged＆GT;
                    ＆LT; / ASP：DropDownList的＆GT;
                    ＆LT; ASP：标签ID =lblBeneficiaryZip=服务器文本=邮编：FONT-名称=Candara＆GT;＆LT; / ASP：标签＆gt;
                     ＆LT; ASP：DropDownList的ID =ddlBeneficiaryZip=服务器AppendDataBoundItems =真WIDTH =100像素
                            的AutoPostBack =真的CssClass =drpdown＆GT;
                        ＆LT; / ASP：DropDownList的＆GT;
                        ＆LT; ASP：按钮的ID =btnBenefeciary的ValidationGroup =贷款人=服务器文本=搜索FONT-名称=Candara的CssClass =btnBenefeciary的OnClick =btnBenefeciary_Click/＆GT;
                        ＆LT; BR＆GT;＆LT; BR＆GT;＆LT; BR＆GT;＆LT; BR＆GT;
                         ＆LT; D​​IV＆GT;
    ＆LT; ASP：GridView控件ID =grvLenderDetails的CssClass =GridViewStyleShowHeaderWhenEmpty =真OnRowCommand =grvLenderDetails_RowCommand=服务器的AutoGenerateColumns =false的AutoGenerateSelectButton =真＆GT;
    ＆LT;柱体和GT;
    .. .. ..
    ＆LT; /专栏＆GT;
    ＆LT; EmptyDataTemplate＆GT;
            无记录可显示
        ＆LT; / EmptyDataTemplate＆GT;
    ＆LT; / ASP：GridView的＆GT;
    ＆LT; / DIV＆GT;
        ＆LT; / DIV＆GT;
        ＆LT; D​​IV ID =fadeLender级=black_overlay=服务器＆GT;
            ＆LT; ASP：ImageButton的ID =imgLenderClose的ImageUrl =../图像/ closepnlbtn.png=服务器
                ALIGN =正确的风格=缘右：140px;的margin-top：78px; BORDER：0像素的OnClick =imgLenderClose_Click/＆GT;
        ＆LT; / DIV＆GT;
    ＆LT; /＆的ContentTemplate GT;
＆LT; / ASP：的UpdatePanel＆GT;


解决方案

我假设文本框是另一个的UpdatePanel 。使得它的UpdateMode 条件，它允许调用它的编程更新方法。 

 保护无效ddlLenderState_SelectedIndexChanged（对象发件人，GridViewSelectEventArgs E）
{
    TxtInfo.Text =你好，我是在GridView的到来。
    UpdInfo.Update（）;
}

另一个形式给出将添加一个 AsyncPostBackTrigger 外的UpdatePanel 与控件ID = grvLenderDetails 和事件名称=的SelectedIndexChanged 。

修改：如果不是在的UpdatePanel 更改。下面举例说明：

 ＆LT; ASP：的UpdatePanel =服务器ID =UpdInfo的UpdateMode =条件＆GT;
   ＆LT;＆的ContentTemplate GT;
       ＆LT; ASP：文本框ID =TxtInfo=服务器/＆GT;
   ＆LT; /＆的ContentTemplate GT;
＆LT; / ASP：的UpdatePanel＆GT;

下面的触发方式，不需要调用更新（）从手动codebehind：

 ＆LT; ASP：的UpdatePanel =服务器ID =UpdInfo的UpdateMode =条件＆GT;
   ＆LT;＆的ContentTemplate GT;
       ＆LT; ASP：文本框ID =TxtInfo=服务器/＆GT;
   ＆LT; /＆的ContentTemplate GT;
   ＆LT;＆触发器GT;
       ＆LT; ASP：AsyncPostBackTrigger控件ID =grvLenderDetails事件名称=的SelectedIndexChanged/＆GT;
   ＆LT; /触发器＆GT;
＆LT; / ASP：的UpdatePanel＆GT;

I have a gridview inside an UpdatePanel ( gridview is showing in a popup). On click of select button in that grid I am trying to set a textbox text in the page. But its not working ,if I remove the update panel then it will work.Please help.

This is my code in aspx:

<div><asp:TextBox ID="txt" runat="server /></div>
     <asp:UpdatePanel ID="updLendersearch" runat="server" UpdateMode="Conditional">
        <Triggers>
            <asp:AsyncPostBackTrigger ControlID="btnLenderSearch" EventName="Click" />
        </Triggers>
        <ContentTemplate>
        <div id="divLender" runat="server" class="white_content" style="height: 450px;top: 20%;width: 57%;">
        <asp:Label ID="lblBenificiary" runat="server" Text="Beneficiary/Lender :" Font-Names="Candara" ></asp:Label>
        <asp:TextBox ID="txtBeneficiaryName" Style="border: 1px solid red" runat="server" Width="80px" CssClass="txtboxes" Font-Names="Candara" ></asp:TextBox>
        <asp:RequiredFieldValidator ID="reqBeneficiaryName" runat="server" ErrorMessage="*" ForeColor="Red" ControlToValidate="txtBeneficiaryName" ValidationGroup="lender"></asp:RequiredFieldValidator>
        <asp:Label ID="lblLenderState" runat="server" Text="State :" Font-Names="Candara" ></asp:Label>
          <asp:DropDownList ID="ddlLenderState" runat="server" AutoPostBack="true" Style="border: 1px solid red" 
                        AppendDataBoundItems="true" CssClass="drpdown" OnSelectedIndexChanged="ddlLenderState_SelectedIndexChanged">
                    </asp:DropDownList>
                    <asp:RequiredFieldValidator ID="reqLenderState" runat="server" ErrorMessage="*" ForeColor="Red" ControlToValidate="ddlLenderState" ValidationGroup="lender"></asp:RequiredFieldValidator>
                    <asp:Label ID="lblLenderCity" runat="server" Text="City :" Font-Names="Candara" ></asp:Label>
                      <asp:DropDownList ID="ddlLenderCity" runat="server" Width="100px" AutoPostBack="true"
                        AppendDataBoundItems="true" CssClass="drpdown" OnSelectedIndexChanged="ddlLenderCity_SelectedIndexChanged">
                    </asp:DropDownList>
                    <asp:Label ID="lblBeneficiaryZip" runat="server" Text="Zip :" Font-Names="Candara" ></asp:Label>
                     <asp:DropDownList ID="ddlBeneficiaryZip" runat="server" AppendDataBoundItems="true" Width="100px"
                            AutoPostBack="true" CssClass="drpdown">
                        </asp:DropDownList>
                        <asp:Button ID="btnBenefeciary" ValidationGroup="lender" runat="server" Text="Search" Font-Names="Candara" CssClass="btnBenefeciary" OnClick="btnBenefeciary_Click"/>
                        <br><br><br><br>
                         <div>
    <asp:GridView ID="grvLenderDetails" CssClass="GridViewStyle" ShowHeaderWhenEmpty="true" OnRowCommand="grvLenderDetails_RowCommand" runat="server" AutoGenerateColumns="false" AutoGenerateSelectButton="true">
    <Columns>
    .. .. ..
    </Columns>
    <EmptyDataTemplate>
            No Records To Display
        </EmptyDataTemplate>
    </asp:GridView>
    </div>
        </div>
        <div id="fadeLender" class="black_overlay" runat="server">
            <asp:ImageButton ID="imgLenderClose" ImageUrl="../Images/closepnlbtn.png" runat="server"
                align="right" Style="margin-right: 140px; margin-top: 78px; border: 0px" OnClick="imgLenderClose_Click" />
        </div>
    </ContentTemplate>
</asp:UpdatePanel>
解决方案

I assume that the TextBox is in another UpdatePanel. Make it's UpdateMode Conditional which allows to call it's Update method programmatically. 

protected void ddlLenderState_SelectedIndexChanged(object sender, GridViewSelectEventArgs e)
{
    TxtInfo.Text = "Hello, i'm coming from the GridView.";
    UpdInfo.Update();
}

Another aproach would be to add an AsyncPostBackTrigger to the outer UpdatePanel with ControlID=grvLenderDetails and EventName=SelectedIndexChanged.

Edit: If it's not in an UpdatePanel change it. Here are examples:

<asp:UpdatePanel runat="server" ID="UpdInfo" UpdateMode="Conditional">
   <ContentTemplate>
       <asp:TextBox ID="TxtInfo" runat="server />
   </ContentTemplate>
</asp:UpdatePanel>

Here the trigger approach that does not require to call Update() from codebehind manually:

<asp:UpdatePanel runat="server" ID="UpdInfo" UpdateMode="Conditional">
   <ContentTemplate>
       <asp:TextBox ID="TxtInfo" runat="server />
   </ContentTemplate>
   <Triggers>
       <asp:AsyncPostBackTrigger ControlID="grvLenderDetails" EventName="SelectedIndexChanged" />
   </Triggers>
</asp:UpdatePanel>

这篇关于在文本框更改文本的UpdatePanel之外的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

10-29 21:53
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