該文本框在當前上下文中不存在
[英]textbox doesnt exist in current context
問題描述
獲取頁面上每個文本框的錯誤，指出它在default.aspx.cs的當前上下文中不存在，即使它們存在於default.aspx中
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<link rel="stylesheet" type="text/css" href="css/bootstrap.css" media="all" />
<link rel="stylesheet" type="text/css" href="css/bootstrap-theme.css" media="all" />
<link rel="stylesheet" type="text/css" href="css/style.css" media="all" />
</head>
<body>
<form id="form1" runat="server">
<table>
<tr>
<td><asp:Label ID="lblTemperature" runat="server" Text="Temperature"></asp:Label></td>
<td><asp:TextBox ID="txtTemp" runat="server" Height="20px" Width="101px"></asp:TextBox></td>
</tr>
<tr>
<td><asp:Button ID="btnCalc" runat="server" OnClick="Button1_Click" Text="Calculate Score" /></td>
<td><asp:Label ID="lblScore" runat="server" Text=""></asp:Label></td>
</tr>
<tr>
<td><asp:Label ID="lblAlert" runat="server" Text=""></asp:Label></td>
</tr>
</table>
</form>
</body>
</html>
和我的default.aspx.cs每次都拋出錯誤，指出當前上下文中不存在文本框和標簽
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Drawing;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
int score;
score = 0;
//CHECK TEMP IS VALID
double Temp;
if (double.TryParse(txtTemp.Text, out Temp))
{ //SUCCESS
}
else
{
//FAIL
}
//TEMP RATE CALC
if (Temp <= 35.0)
{
score = score + 3;
}
else if (Temp >= 35.1 && Temp <= 36.0)
{
score = score + 1;
}
else if (Temp >= 36.1 && Temp <= 38.0)
{
score = score + 0;
}
else if (Temp >= 38.1 && Temp <= 39.0)
{
score = score + 1;
}
else if (Temp >= 39.1)
{
score = score + 2;
}
//WriteScore
lblScore.Text = score.ToString();
if (score <= 1)
{
lblAlert.Text = "GREEN";
lblAlert.ForeColor = Color.Green;
}
else if (score >= 2 && score <= 4)
{
lblAlert.Text = "AMBER";
lblAlert.ForeColor = Color.Orange;
}
else if (score >= 5)
{
lblAlert.Text = "RED";
lblAlert.ForeColor = Color.Red;
}
}
}
2 個解決方案
解決方案1
0 2015-04-11 14:28:19
嘗試使用干凈的解決方案，然后重新構建！
解決方案2
0 2016-04-02 05:27:28
只需在設計表單中再添加一個文本框，即可立即解決此錯誤，您可以刪除新的文本框
DataGrgid DataRowTemplate中的當前上下文中不存在TextBox
[英]TextBox does not exist in the current context in DataGrgid DataRowTemplate
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