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從asp.net讀取文本框值並將其傳遞給c#變量

[英]Read textbox value from asp.net and pass it to c# variable

當我填寫表單時,我要使用一個帶有表單i的頁面,我想在我的C#代碼隱藏文件中訪問該表單數據。

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;
    }
}

我必須使用什么功能從asp.net文本框中讀取並將其傳遞給c#codebehind變量?

更新:

您需要將標記括在<asp:Content></asp:Content>標記中,因為您使用的是母版頁。


如果使用Visual Studio生成Web項目,則可以看到Register.aspx.designer.cs,其代碼應如下所示。 如果不這樣做,則將其添加到類中(可以將其添加到Register.aspx.cs或Register.aspx.designer.cs中)。

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

那你可以用

string UserName = Utilizador.Text;

更新:

我只是嘗試了一下,似乎工作正常:

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>

確保您的代碼位於<form runat="server"></form>標記內?

您的代碼應如下所示:

<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

在母版頁/內容占位符中引用控件

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