從asp.net讀取文本框的值，並將其傳遞給c＃變量

Question

當我填充表單時，我想要在我的c＃代碼隱藏文件中訪問該表單數據，我有一個帶有表單的頁面。

Register.aspx：

<%@ Page Title="Home" Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="True" CodeBehind="Register.aspx.cs" Inherits="Informito._Default" %> 
<div> 
    <table class="style1"> 
    <tr> 
     <td>Utilizador:</td> 
     <td><asp:TextBox ID="Utilizador" name="Utilizador" runat="server"></asp:TextBox></td> 
    </tr> 
    <tr> 
     <td>Password:</td> 
     <td><asp:TextBox ID="Password" runat="server" TextMode="Password"></asp:TextBox></td> 
    </tr> 
    </table> 
</div> 
<asp:Button ID="Button1" runat="server" Text="Registar" OnClick="Registar"/> 

Register.aspx.cs：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using System.Web.UI.WebControls.WebParts; 
using System.Web.UI.HtmlControls; 
using System.Web.Security; 
using System.Data.SqlClient; 
using Informito.Admins; 

namespace Informito 
{ 
    public partial class _Default : Page 
    { 

     protected void Page_Load(object sender, EventArgs e) 
     { 

     } 

     public void Registar(object sender, EventArgs e) 
     { 
      string Username = Utilizador.Text; //Error here: Object reference not set to an instance of an object. 
      string Password= Password.Text; 
      RegisterUser(Username, Password, 1); 
     } 

    } 
} 

Register.aspx.designer.cs：

namespace Informito { 


    public partial class _Default { 

     protected global::System.Web.UI.WebControls.LoginView LoginView1; 
     protected global::System.Web.UI.WebControls.TextBox Utilizador; 
     protected global::System.Web.UI.WebControls.TextBox Password; 
    } 
} 

我必須使用什麼函數從asp.net文本框中讀取並通過c＃codebehind變量傳遞給它？

Answer 1

UPDATE：

你需要，因爲你正在使用附上您的標記在<asp:Content></asp:Content>標籤一個母版頁。

---

如果你已經使用Visual Studio來生成你的Web項目，然後就可以看到Register.aspx.designer.cs應該有像下面的代碼。如果你沒有，那麼將它添加到類中（可以將它添加到Register.aspx.cs或Register.aspx.designer.cs中）。

protected global::System.Web.UI.WebControls.TextBox Utilizador; 

然後你可以使用

string UserName = Utilizador.Text; 

---

UPDATE：

我只是嘗試這樣做，似乎很好地工作：

Register.aspx.cs

public void Registar(object sender, EventArgs e) 
{ 
    string Username = Utilizador.Text; 
    string PassWd = Password.Text; 
    RegisterUser(Username, PassWd, 1); 
} 

Register.aspx.designer.cs

public partial class _Default { 

     protected global::System.Web.UI.WebControls.TextBox Utilizador; 
     protected global::System.Web.UI.WebControls.Button Button1; 
     protected global::System.Web.UI.WebControls.TextBox Password; 
    } 

Register.aspx

<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" 
    CodeBehind="Register.aspx.cs" Inherits="Informito._Default" %> 

<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent"> 
<div> 
    <table class="style1"> 
    <tr> 
     <td>Utilizador:</td> 
     <td><asp:TextBox ID="Utilizador" name="Utilizador" runat="server"></asp:TextBox></td> 
    </tr> 
    <tr> 
     <td>Password:</td> 
     <td><asp:TextBox ID="Password" runat="server" TextMode="Password"></asp:TextBox></td> 
    </tr> 
    </table> 
</div> 
<asp:Button ID="Button1" runat="server" Text="Registar" OnClick="Registar"/> 
</asp:Content> 

Answer 2

確保您的代碼在​​標記內？

您的代碼應該是這樣的：

<form runat='server' id="form1"> 
<div> 
<table class="style1"> 

<tr> 
<td>Utilizador:</td> 
<td> 
<asp:TextBox ID="Utilizador" name="Utilizador" runat="server"></asp:TextBox> 
</td> 
</tr> 
<tr> 
<td>Password:</td> 
<td><asp:TextBox ID="Password" runat="server" TextMode="Password"></asp:TextBox></td> 
</tr> 
</table> 
</div> 
<asp:Button ID="Button1" runat="server" Text="Registar" OnClick="Registar"/> 
</form> 

編輯

To reference controls in a master page/content placeholder