求一个登录代码和连接数据库的代码
我在做一个项目，用C#语言编写，可我没学过，刚开始先用编写登录界面，点击登录之后验证成功还是失败，需要连接数据库，连接数据库的时候出错，由于本人学识浅薄，所以请各位帮帮忙，给一个代码，或帮忙修改一下，先谢了！登录界面代码：Default.asp
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.
<html xmlns="http://www. >
<head id="Head1" runat="server">
<title>Ｌｏｇｉｎ</title>
</head>
<body >
<form id="form1" runat="server">
<div>
<table style="width: 230px; left: 269px; position: absolute; top: 29px;">
<tr>
<td>
<asp:DropDownList ID="DropDownLisEmotion" runat="server">
<asp:ListItem Value="管理员">管理员</asp:ListItem>
<asp:ListItem Value="检测员">检测员</asp:ListItem>
<asp:ListItem Value="复检员">复检员</asp:ListItem>
<asp:ListItem Value="业务员">业务员</asp:ListItem>
</asp:DropDownList>
</td>
</tr>
<tr>.
<td style="width: 168px; text-align: right" align="right">
UserName</td>
<td style="width: 253px">
<asp:TextBox ID="txtUserName" runat="server"></asp:TextBox></td>
</tr>
<tr>
<td style="width: 168px; text-align: right; height: 24px;" align="right">
UserPsw</td>
<td style="height: 24px; width: 253px;">
<asp:TextBox ID="txtUserPsw" runat="server" Font-Bold="True" Font-Overline="True" Font-Underline="True"></asp:TextBox></td>
</tr>
<tr>
<td style="width: 228px; text-align: center" colspan="2" rowspan="2">
<asp:Button ID="btnSubmit" runat="server" Text="登录" OnClick="btnSubmit_Click" />
<asp:Button ID="btnClear" runat="server" Text="清除" OnClick="btnClear_Click" />
<input id="Reset1" type="reset" value="重置" /><br />
<asp:Label ID="lblMsg" runat="server" Width="192px"></asp:Label></td>
</tr>
</table>
</div>
</form>
</body>
</html>
连接数据库的代码:Default.asp.cs
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
this.txtUserName.Text = "";
this.txtUserPsw.Text = "";
}
this.lblMsg.Text = "";
}
protected void btnClear_Click(object sender, EventArgs e)
{
this.txtUserName.Text = "";
this.txtUserPsw.Text = "";
}
protected void btnSubmit_Click(object sender, EventArgs e)
{
if (this.txtUserName.Text == "")
{
this.lblMsg.Text = "用户名不能为空";
this.txtUserName.Focus();
}
else
{
if (this.txtUserPsw.Text == "")
{
this.lblMsg.Text = "密码不能为空";
this.txtUserPsw.Focus();
}
}
if (this.txtUserName.Text != "" && this.txtUserPsw.Text != "")
{
if (Login(this.txtUserName.Text, this.txtUserPsw.Text))
{
this.lblMsg.Text = txtUserName.Text + "登录成功！";
}
else
{
this.lblMsg.Text = "登录失败请检查用户名和密码！";
}
}
}
private bool Login(string UserName, string UserPwd)
{
SqlConnection CONN = new SqlConnection("server=192.168.0.2;database=login;uid=sa;pwd=;");
CONN.Open();
SqlCommand CMD = new SqlCommand("select count(*) from login where UserName='" + UserName + "' and UserPwd='" + UserPwd + "'", CONN);
int count = Convert.ToInt32(CMD.ExecuteScalar());
if (count > 0)
{
return true;
}
else
{
return false;
}
}
private string DateTime()
{
throw new Exception("The method or operation is not implemented.");
}
}
希望多多指教！
