我有一个以前由其他人构建的项目。当我尝试向页面添加新控件时，我无法在后面的代码中访问它。当我尝试访问它时，出现一条错误消息，指出该控件未在当前上下文中定义。
<%@ Page Language="C#" MasterPageFile="~/HRMS.Master" AutoEventWireup="true" CodeBehind="manageEmployee.aspx.cs" Inherits="HRMS.manageEmployee" Title="Untitled Page" %>
<%@ Register Assembly="eWorld.UI" Namespace="eWorld.UI" TagPrefix="ew" %>
<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="cc1" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
<script type="text/javascript">
document.getElementById("employee").setAttribute("class", "selected");
</script>
<!--OPEN CONTENT DIV-->
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<!-- Only this area is updated on PostBack -->
<div class="manage_employ">
<ul>
<li style="margin-top:10px; margin-bottom:15px"><input type="image" src="images/img_manageEmployee01.png"/></li>
</ul>
<ul>
<li>First name</li>
<li><asp:TextBox runat="server" class="text_input" id="txtFirstName"/></li>
<asp:RequiredFieldValidator ID="validatorFirstName" runat="server" ErrorMessage="*" ControlToValidate="txtFirstName"></asp:RequiredFieldValidator>
<li>Last name</li>
<li><asp:TextBox runat="server" class="text_input" id="txtLastName"/></li>
<asp:RequiredFieldValidator ID="validatorLastname" runat="server" ErrorMessage="*" ControlToValidate="txtLastName"></asp:RequiredFieldValidator>
</ul>
<ul>
<li>CNIC</li>
<li><asp:TextBox runat="server" class="text_input" id="txtCNIC"/></li>
<asp:RequiredFieldValidator ID="validatorCNIC" runat="server" ErrorMessage="*" ControlToValidate="txtCNIC"></asp:RequiredFieldValidator>
<li>Blood Group</li>
<li><asp:DropDownList runat="server" class="text_input" id="ddlBloodGroup">
<asp:ListItem>A+</asp:ListItem>
<asp:ListItem>B+</asp:ListItem>
<asp:ListItem>AB+</asp:ListItem>
<asp:ListItem>A-</asp:ListItem>
<asp:ListItem>B-</asp:ListItem>
<asp:ListItem>AB-</asp:ListItem>
<asp:ListItem>O+</asp:ListItem>
<asp:ListItem>O-</asp:ListItem>
</asp:DropDownList>
</li>
</ul>
<ul>
<li>Mobile</li>
<li><asp:TextBox runat="server" class="text_input" id="txtMobile"/></li>
<asp:RequiredFieldValidator ID="validatorMobile" runat="server" ErrorMessage="*" ControlToValidate="txtMobile"></asp:RequiredFieldValidator>
<li>Phone</li>
<li><asp:TextBox runat="server" class="text_input" id="txtPhone"/></li>
</ul>
<ul>
</ul>
<ul>
<li>E-Mail</li>
<li><asp:TextBox runat="server" class="text_input" id="txtEmail"/></li>
<asp:RegularExpressionValidator ID="valEmail" ControlToValidate="txtEmail" runat="server" ErrorMessage="*" ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*">*</asp:RegularExpressionValidator>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<li>Maritial Status</li>
<li>
<asp:RadioButton ID="rbtnMarried" AutoPostBack="true" runat="server" oncheckedchanged="rbtnMarried_CheckedChanged"/>Married
<asp:RadioButton ID="rbtnUnmarried" AutoPostBack="true" runat="server"
oncheckedchanged="rbtnUnmarried_CheckedChanged"/>Unmarried
</li>
</ContentTemplate>
</asp:UpdatePanel>
</ul>
<ul>
<li>Permanant Address</li>
<li><asp:TextBox runat="server" class="text_input" id="txtPermanantAddress"/></li>
<asp:RequiredFieldValidator ID="validatorPAddress" runat="server" ErrorMessage="*" ControlToValidate="txtPermanantAddress"></asp:RequiredFieldValidator>
<li>Temporary Address</li>
<li><asp:TextBox runat="server" class="text_input" id="txtTemporaryAddress"/></li>
<asp:RequiredFieldValidator ID="validatorTAddress" runat="server" ErrorMessage="*" ControlToValidate="txtTemporaryAddress"></asp:RequiredFieldValidator>
</ul>
<ul>
<li>Salary</li>
<li><asp:TextBox runat="server" class="text_input" id="txtSalary"/></li>
<asp:RequiredFieldValidator ID="validatorSalary" runat="server" ErrorMessage="*" ControlToValidate="txtSalary"></asp:RequiredFieldValidator>
<li>Joining Date</li>
<li>
<%--<ew:calendarpopup ID="calJoiningDate" runat="server"></ew:calendarpopup>--%>
<asp:TextBox ID="CalJoiningDate1" runat="server" CssClass="text_input"></asp:TextBox>
<cc1:CalendarExtender ID="CalJoiningDate1_CalendarExtender" runat="server"
Enabled="True" TargetControlID="CalJoiningDate1">
</cc1:CalendarExtender>
</li>
</ul>
<ul>
<li>Job Area</li>
<li><asp:DropDownList runat="server" class="text_input" id="ddlJobArea"/></li>
<li>Desigantion</li>
<li><asp:DropDownList runat="server" class="text_input" id="ddlDesignation"/></li>
</ul>
<asp:UpdatePanel ID="updatePnl" runat="server">
<ContentTemplate>
<div>
<ul>
<li style="margin-top:20px; margin-bottom:15px"><input type="image" src="images/img_jobHistory.png" /></li>
</ul>
<ul>
<li>Company</li>
<%--<asp:DropDownList runat="server" class="text_input" id="ddlCompany"
onselectedindexchanged="ddlCompany_SelectedIndexChanged"/>--%>
<li><asp:TextBox ID="CompanyNames" runat="server" CssClass="text_input"></asp:TextBox>
<cc1:AutoCompleteExtender ID="CompanyNames_AutoCompleteExtender" runat="server"
DelimiterCharacters="" Enabled="True" ServicePath="getCompanies.asmx" ServiceMethod="getCompaniesMethod" MinimumPrefixLength="1"
TargetControlID="CompanyNames" UseContextKey="True">
</cc1:AutoCompleteExtender>
<li>Job Duration</li>
<li>
<asp:TextBox ID="txtJobDuration" runat="server" class="text_input" />
</li>
<asp:RequiredFieldValidator ID="validatorJobDuration" runat="server"
ControlToValidate="txtJobDuration" ErrorMessage="*"
ValidationGroup="jobHistory"></asp:RequiredFieldValidator>
</li>
</ul>
<ul>
<li>Job Area</li>
<li><asp:DropDownList runat="server" class="text_input" id="ddlJobHistJobArea"/></li>
<li>Designation</li>
<li><asp:DropDownList runat="server" class="text_input" id="ddlJobHistoryDesignation"/></li>
</ul>
<ul>
<li>Last Drawn Salary</li>
<li><asp:TextBox runat="server" class="text_input" id="txtLastDrawnSalary"/>
</li>
<asp:RequiredFieldValidator ID="validatorLastDrawnSalary" runat="server" ValidationGroup="jobHistory" ErrorMessage="*" ControlToValidate="txtLastDrawnSalary"></asp:RequiredFieldValidator>
</ul>
<ul>
<li style="margin-left:160px">
<asp:ImageButton src="images/btn_Add.png" runat="server" ID="btnAddJobHistory" onclick="btnAddJobHistory_Click" CausesValidation="True" ValidationGroup="jobHistory"/>
<asp:ImageButton src="images/btnReset.png" runat="server" ID="btnResetJH" CausesValidation="False" onclick="btnResetJH_Click"/>
</li>
</ul>
<ul style="margin-left:30px">
<asp:GridView ID="grdJobHistory" runat="server" AutoGenerateColumns="False" Width="798px"
AllowPaging="True"
onpageindexchanging="grdJobHistory_PageIndexChanging"
onrowcommand="grdJobHistory_RowCommand"
onrowdeleting="grdJobHistory_RowDeleting"
onrowediting="grdJobHistory_RowEditing" Font-Bold="True"
Font-Names="Calibri" Font-Size="Medium" ForeColor="White" PageSize="5">
<Columns>
<asp:BoundField DataField="EmployeeExperianceId"
HeaderText="EmployeeExperianceId" />
<asp:BoundField HeaderText="Company" DataField="CompanyName" ReadOnly="True" >
<ItemStyle Font-Names="Calibri,Verdana,Arial,Helvetica,sans-serif"
Font-Size="Small" ForeColor="#3F4A53" />
</asp:BoundField>
<asp:BoundField DataField="JobAreaName" HeaderText="Job Area" >
<ItemStyle Font-Names="Calibri,Verdana,Arial,Helvetica,sans-serif"
Font-Size="Smaller" ForeColor="#3F4A53" />
</asp:BoundField>
<asp:BoundField HeaderText="Designation" DataField="DesignationName"
ReadOnly="True" >
<ItemStyle Font-Names="Calibri,Verdana,Arial,Helvetica,sans-serif"
Font-Size="Small" ForeColor="#3F4A53" />
</asp:BoundField>
<asp:BoundField HeaderText="Experiance Duration" DataField="ExperianceDuration"
ReadOnly="True" >
<ItemStyle Font-Names="Calibri,Verdana,Arial,Helvetica,sans-serif"
Font-Size="Small" ForeColor="#3F4A53" />
</asp:BoundField>
<asp:BoundField HeaderText="Salary" DataField="LastDrawnSalary" ReadOnly="True" >
<ItemStyle Font-Names="Calibri,Verdana,Arial,Helvetica,sans-serif"
Font-Size="Small" ForeColor="#3F4A53" />
</asp:BoundField>
<asp:TemplateField AccessibleHeaderText="Edit" HeaderText="Edit">
<ItemTemplate>
<asp:ImageButton ID="imgBtnEdit" runat="server" ImageUrl="images/updateIcon.png" CausesValidation="False" CommandName="Edit" CommandArgument='<%# DataBinder.Eval(Container.DataItem, "EmployeeExperianceId") %>'/>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField AccessibleHeaderText="Delete" HeaderText="Delete">
<ItemTemplate>
<asp:ImageButton ID="imgBtnDelete" runat="server" ImageUrl="images/deleteIcon.png" CausesValidation="False" CommandName="Delete" CommandArgument='<%# DataBinder.Eval(Container.DataItem, "EmployeeExperianceId") %>' OnClientClick="return confirm('Are you sure you want to delete this record...');"/>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<HeaderStyle BackColor="#5D92B9" BorderStyle="None" />
<AlternatingRowStyle BackColor="#AAAAAA" />
</asp:GridView>
</ul>
</div>
<div>
<ul>
<li style="margin-top:20px; margin-bottom:15px"><input type="image" src="images/img_skillDetail.png" /></li>
</ul>
<ul>
<li>Skill</li>
<!--<li><asp:DropDownList runat="server" class="text_input" id="ddlSkill"/></li>-->
<li>
<asp:TextBox ID="SkillAutoComplete" runat="server" CssClass="text_input"></asp:TextBox>
<cc1:AutoCompleteExtender ID="SkillAutoComplete_AutoCompleteExtender"
runat="server" DelimiterCharacters="" Enabled="True" ServicePath="getSkills.asmx" ServiceMethod="getAllSkills" MinimumPrefixLength="1"
TargetControlID="SkillAutoComplete">
</cc1:AutoCompleteExtender>
</li>
<li>Skill Detail</li>
<li><asp:TextBox runat="server" class="text_input" id="txtSkillDetail"/></li>
<asp:RequiredFieldValidator ID="validatorSkillDetail" runat="server" ValidationGroup="skill" ErrorMessage="*" ControlToValidate="txtSkillDetail"></asp:RequiredFieldValidator>
</ul>
<ul>
<li style="margin-left:160px">
<asp:ImageButton src="images/btn_Add.png" runat="server" ID="btnAddSkill" CausesValidation="True" ValidationGroup="skill" onclick="btnAddSkill_Click"/>
<asp:ImageButton src="images/btnReset.png" runat="server" ID="btnResetSkill" CausesValidation="False" onclick="btnResetSkill_Click"/>
</li>
</ul>
<ul style="margin-left:30px">
<asp:GridView ID="grdSkill" runat="server" AutoGenerateColumns="False" Width="798px"
AllowPaging="True"
onpageindexchanging="grdSkill_PageIndexChanging"
onrowcommand="grdSkill_RowCommand"
onrowdeleting="grdSkill_RowDeleting"
onrowediting="grdSkill_RowEditing" Font-Bold="True"
Font-Names="Calibri" Font-Size="Medium" ForeColor="White" PageSize="5">
<Columns>
<asp:BoundField HeaderText="EmployeeSkillId" DataField="EmployeeSkillId" >
</asp:BoundField>
<asp:BoundField DataField="SkillName" HeaderText="Skill Name" ReadOnly="True">
<ItemStyle Font-Names="Calibri,Verdana,Arial,Helvetica,sans-serif"
Font-Size="Small" ForeColor="#3F4A53" />
</asp:BoundField>
<asp:BoundField HeaderText="Skill Detail" DataField="SkillDetail"
ReadOnly="True" >
<ItemStyle Font-Names="Calibri,Verdana,Arial,Helvetica,sans-serif"
Font-Size="Small" ForeColor="#3F4A53" />
</asp:BoundField>
<asp:TemplateField>
<ItemTemplate>
<asp:ImageButton ID="imgBtnEdit" runat="server" ImageUrl="images/updateIcon.png" CausesValidation="false" CommandName="Edit" CommandArgument='<%# DataBinder.Eval(Container.DataItem, "EmployeeSkillId") %>'/>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<ItemTemplate>
<asp:ImageButton ID="imgBtnDelete" runat="server" ImageUrl="images/deleteIcon.png" CommandName="Delete" CommandArgument='<%# DataBinder.Eval(Container.DataItem, "EmployeeSkillId") %>' OnClientClick="return confirm('Are you sure you want to delete this record...');"/>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<HeaderStyle BackColor="#5D92B9" BorderStyle="None" />
<AlternatingRowStyle BackColor="#AAAAAA" />
</asp:GridView>
</ul>
</div>
<div>
<ul>
<li style="margin-top:20px; margin-left:20px; margin-bottom:15px"><input type="image" src="images/img_qualificationDetail.png" /></li>
</ul>
<ul>
<li>Course</li>
<li><asp:DropDownList runat="server" class="text_input" id="ddlCourse"/></li>
<li>Institution</li>
<li><asp:TextBox runat="server" class="text_input" id="txtInstitution"/></li>
<asp:RequiredFieldValidator ID="validatorInsitution" runat="server" ValidationGroup="course" ErrorMessage="*" ControlToValidate="txtInstitution"></asp:RequiredFieldValidator>
</ul>
<ul>
<li>Duration</li>
<li><asp:TextBox runat="server" class="text_input" id="txtCourseDuration"/></li>
<asp:RequiredFieldValidator ID="validatorDuration" runat="server" ValidationGroup="course" ErrorMessage="*" ControlToValidate="txtCourseDuration"></asp:RequiredFieldValidator>
<li>Passing Year</li>
<li>
<asp:TextBox ID="calPassingYear1" runat="server" CssClass="text_input"></asp:TextBox>
</li>
<!--<li><ew:CalendarPopup ID="calPassingYear" runat="server"></ew:CalendarPopup></li>-->
</ul>
<ul>
<li>Marks/Percentage/GPA</li>
<li><asp:TextBox runat="server" class="text_input" id="txtMarksPercentage"/></li>
<asp:RequiredFieldValidator ID="validatorMarks" runat="server" ValidationGroup="course" ErrorMessage="*" ControlToValidate="txtMarksPercentage"></asp:RequiredFieldValidator>
<li style="margin-left:160px">
<asp:ImageButton src="images/btn_Add.png" runat="server" ID="btnAddCourse" CausesValidation="True" onclick="btnAddCourse_Click" ValidationGroup="course"/>
<asp:ImageButton src="images/btnReset.png" runat="server" ID="btnResetCourse" CausesValidation="False" onclick="btnResetCourse_Click" />
</li>
</ul>
<ul style="margin-left:30px">
<asp:GridView ID="grdCourse" runat="server" AutoGenerateColumns="False" Width="798px"
AllowPaging="True"
onpageindexchanging="grdCourse_PageIndexChanging"
onrowcommand="grdCourse_RowCommand"
onrowdeleting="grdCourse_RowDeleting"
onrowediting="grdCourse_RowEditing" Font-Bold="True"
Font-Names="Calibri" Font-Size="Medium" ForeColor="White" PageSize="5">
<Columns>
<asp:BoundField DataField="EmployeeQualificationId"
HeaderText="EmployeeQualificationId" />
<asp:BoundField HeaderText="Course" DataField="CourseTitle" ReadOnly="True" >
<ItemStyle Font-Names="Calibri,Verdana,Arial,Helvetica,sans-serif"
Font-Size="Small" ForeColor="#3F4A53" />
</asp:BoundField>
<asp:BoundField HeaderText="Institution" DataField="InstitutionName"
ReadOnly="True" >
<ItemStyle Font-Names="Calibri,Verdana,Arial,Helvetica,sans-serif"
Font-Size="Small" ForeColor="#3F4A53" />
</asp:BoundField>
<asp:BoundField HeaderText="Duration" DataField="Duration"
ReadOnly="True" >
<ItemStyle Font-Names="Calibri,Verdana,Arial,Helvetica,sans-serif"
Font-Size="Small" ForeColor="#3F4A53" />
</asp:BoundField>
<asp:BoundField HeaderText="Passing Year" DataField="YearOfPassing"
ReadOnly="True" >
<ItemStyle Font-Names="Calibri,Verdana,Arial,Helvetica,sans-serif"
Font-Size="Small" ForeColor="#3F4A53" />
</asp:BoundField>
<asp:BoundField HeaderText="Marks/Percentage/GPA" DataField="MarksPercentage"
ReadOnly="True" >
<ItemStyle Font-Names="Calibri,Verdana,Arial,Helvetica,sans-serif"
Font-Size="Small" ForeColor="#3F4A53" />
</asp:BoundField>
<asp:TemplateField>
<ItemTemplate>
<asp:ImageButton ID="imgBtnEdit" runat="server" ImageUrl="images/updateIcon.png" CausesValidation="false" CommandName="Edit" CommandArgument='<%# DataBinder.Eval(Container.DataItem, "EmployeeQualificationId") %>'/>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<ItemTemplate>
<asp:ImageButton ID="imgBtnDelete" runat="server" ImageUrl="images/deleteIcon.png" CommandName="Delete" CommandArgument='<%# DataBinder.Eval(Container.DataItem, "EmployeeQualificationId") %>' OnClientClick="return confirm('Are you sure you want to delete this record...');"/>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<HeaderStyle BackColor="#5D92B9" BorderStyle="None" />
<AlternatingRowStyle BackColor="#AAAAAA" />
</asp:GridView>
</ul>
</div>
</ContentTemplate>
</asp:UpdatePanel>
<ul>
<li style="margin-left:90px; margin-bottom:10px;">
<asp:ImageButton ID="btnSubmit" AlternateText="submit button" runat="server" src="images/btn_Submit.png" onclick="btnSubmit_Click"/>
</li>
</ul>
</div>
<!--CLOSE CONTENT DIV-->
</asp:Content>
例如:
当我尝试添加一些 ASP.NET 服务器端控件时，例如 <asp:testBox id="txtBox" runat="server"/>它们在后面的代码中不可访问。:
Error: txtBox is not defined in the current Context ...
我做错了什么？
最佳答案
当我通过在解决方案中创建一个 asp.net 应用程序项目并将 aspx 和 aspx.cs 文件复制过来，将网站移动到主要解决方案时，我遇到了这个问题。我通过右键单击项目并转换为 Web 应用程序来解决它。这创建了必要的 designer.cs 文件，其中包含 aspx 页面上的 asp 对象的代码。
关于c# - 无法在代码隐藏中访问 Asp.net 控件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/6180509/
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