ado.net 数据库总是连接不上
using System;
using System.Data;
using System.Configuration;
using System.Collections;
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)
{
}
protected void btnLogin_Click(object sender, EventArgs e)
{
string name = this.txtName.Text; //得到登陆帐号
string pwd = this.txtpwd.Text; //得到登陆密码
SqlConnection con = new SqlConnection(); //连接数据库对象
con.ConnectionString = "Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirectory|Database.mdf;Integrated Security=True;User Instance=True";
// 创建命令（SqlCommand）对象(cmd)
SqlCommand cmd = new SqlCommand();
cmd.Connection = con; // 指示命令发给哪个数据库
cmd.CommandType = CommandType.Text; // 指示是什么类型的命令
cmd.CommandText = "SELECT username,password FROM user WHERE username='" + txtName.Text + "' and password='" + txtpwd.Text + "'";
con.Open(); // 打开连接，准备接受命令
SqlDataReader reader = cmd.ExecuteReader();
//// Read方法开始读取数据，读到记录，则返回true,并指向下一条记录，否则返回false
if (reader.Read())
{
con.Close();
Response.Redirect("good.aspx");
}
else
{
con.Close();
Response.Write("<script>alert('登录失败')</script>");
}
}
行 38: SqlDataReader reader = cmd.ExecuteReader();
行 39:
行 40: if (reader.Read())
源文件: e:\学习\asp.net实训\实训\Default.aspx.cs 行: 38
堆栈跟踪:
[SqlException (0x80131904): 关键字 'user' 附近有语法错误。]
System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) +109
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +57
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +207
System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +2423
System.Data.SqlClient.SqlDataReader.ConsumeMetaData() +33
System.Data.SqlClient.SqlDataReader.get_MetaData() +80
System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) +291
System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) +949
System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) +242
System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) +20
System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) +129
System.Data.SqlClient.SqlCommand.ExecuteReader() +85
_Default.btnLogin_Click(Object sender, EventArgs e) in e:\学习\asp.net实训\实训\Default.aspx.cs:38
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +78
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +100
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2863
--------------------------------------------
版本信息: Microsoft .NET Framework 版本:2.0.50727.5466; ASP.NET 版本:2.0.50727.5456
[最优解释]
SELECT [username],[password] FROM [user] WHERE [username]='" + txtName.Text + "' and [password]='" + txtpwd.Text + "'";
这些词是数据库的保留词，应该加上中括号
[其他解释]
因为 user是数据库关键字 改成这样[user]
------其他解决方案--------------------
谢谢两位大神
