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>