我有一个带有附加步骤(名字和姓氏)的登录控件。代码是这样的:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>CreateUserWizard Extra</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:CreateUserWizard
id="CreateUserWizard1"
OnCreatedUser="CreateUserWizard1_CreatedUser"
Runat="server" >
<WizardSteps>
<asp:WizardStep>
<asp:Label
id="lblFirstName"
Text="First Name:"
AssociatedControlID="txtFirstName"
Runat="server" />
<br />
<asp:TextBox
id="txtFirstName"
Runat="server" />
<br /><br />
<asp:Label
id="lblLastName"
Text="Last Name:"
AssociatedControlID="txtLastName"
Runat="server" />
<br />
<asp:TextBox
id="txtLastName"
Runat="server" />
</asp:WizardStep>
<asp:CreateUserWizardStep />
</WizardSteps>
</asp:CreateUserWizard>
</div>
</form>
</body>
</html>
在后面的代码中:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Web.Configuration;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void CreateUserWizard1_CreatedUser(object sender, EventArgs e)
{
CreateUserProfile(CreateUserWizard1.UserName, txtFirstName.Text, txtLastName.Text);
}
private void CreateUserProfile(string userName, string firstName, string lastName)
{
string conString = WebConfigurationManager.ConnectionStrings["UserProfiles"].ConnectionString;
SqlConnection con = new SqlConnection(conString);
SqlCommand cmd = new SqlCommand("INSERT UserProfiles (UserName,FirstName,LastName) VALUES (@UserName,@FirstName,@LastName)", con);
cmd.Parameters.AddWithValue("@UserName", userName);
cmd.Parameters.AddWithValue("@FirstName", firstName);
cmd.Parameters.AddWithValue("@LastName", lastName);
using (con)
{
con.Open();
cmd.ExecuteNonQuery();
}
}
}
但是当我运行该网站时,我得到了下一个错误:
你调用的对象是空的。
说明:执行当前 Web 请求期间发生未处理的异常。请查看堆栈跟踪以获取有关错误及其源自代码的位置的更多信息。
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:
Line 13: private void CreateUserProfile(string userName, string firstName, string lastName)
Line 14: {
Line 15: string conString = WebConfigurationManager.ConnectionStrings["UserProfiles"].ConnectionString;
Line 16: SqlConnection con = new SqlConnection(conString);
Line 17: SqlCommand cmd = new SqlCommand("INSERT UserProfiles (UserName,FirstName,LastName) VALUES (@UserName,@FirstName,@LastName)", con);
Source File: c:\Users\User\Desktop\Vivilove\CreateUserWizardExtra.aspx Line: 15
我不知道发生了什么。请帮忙...