C# Windows CE上的异常“SqlException”（System.Data.SQLClient）

执行命令时，会给出以下SqlException。已建立连接。客户端操作系统是查询SQL Server 2012数据库的模拟Windows CE

此行上会引发异常：

SqlDataReader reader = Shared.command.GetCommand().ExecuteReader();

Shared是一类具有初始化静态对象的变量

密码

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问题已经解决了。我的SQL参数是问题的原因

以下内容必须更改

List <SqlParameter> parameters = new List<SqlParameter>();
parameters.Add(new SqlParameter("BARCODE", tbxBarcode.Text));

Shared.command.SetCommand("SELECT * FROM table WHERE BARCODE_STRING = @BARCODE", parameters);

IV_Barcode barcode = new IV_Barcode();
DataTable table = barcode.Execute();

。。。为此：

List <SqlParameter> parameters = new List<SqlParameter>();
parameters.Add(new SqlParameter("@BARCODE", tbxBarcode.Text));

Shared.command.SetCommand("SELECT * FROM table WHERE BARCODE_STRING = @BARCODE", parameters);

IV_Barcode barcode = new IV_Barcode();
DataTable table = barcode.Execute();

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使用调试器作为启动程序。。还可以使用{}将Sql对象包装在一个数组中。是的，问题在于参数，应该使用@BARCODE而不是BARCODE。

List <SqlParameter> parameters = new List<SqlParameter>();
parameters.Add(new SqlParameter("BARCODE", tbxBarcode.Text));

Shared.command.SetCommand("SELECT * FROM table WHERE BARCODE_STRING = @BARCODE", parameters);

IV_Barcode barcode = new IV_Barcode();
DataTable table = barcode.Execute();

   at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, TdsParserState state)
   at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, TdsParserState state)
   at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning()
   at System.Data.SqlClient.TdsParser.Run(RunBehavior run, SqlCommand cmdHandler, SqlDataReader dataStream)
   at System.Data.SqlClient.SqlDataReader.ConsumeMetaData()
   at System.Data.SqlClient.SqlDataReader.get_MetaData()
   at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream)
   at System.Data.SqlClient.SqlCommand.ExecuteReader()
   at Inventory_Checker.IV_Barcode.Execute()
   at Inventory_Checker.frmMain.tbxBarcode_LostFocus(Object sender, EventArgs e)
   at System.Windows.Forms.Control.OnLostFocus(EventArgs e)
   at System.Windows.Forms.Control.WnProc(WM wm, Int32 wParam, Int32 lParam)
   at System.Windows.Forms.Control._InternalWnProc(WM wm, Int32 wParam, Int32 lParam)
   at Microsoft.AGL.Forms.EVL.EnterMainLoop(IntPtr hwnMain)
   at System.Windows.Forms.Application.Run(Form fm)
   at Inventory_Checker.Program.Main()

List <SqlParameter> parameters = new List<SqlParameter>();
parameters.Add(new SqlParameter("BARCODE", tbxBarcode.Text));

Shared.command.SetCommand("SELECT * FROM table WHERE BARCODE_STRING = @BARCODE", parameters);

IV_Barcode barcode = new IV_Barcode();
DataTable table = barcode.Execute();

List <SqlParameter> parameters = new List<SqlParameter>();
parameters.Add(new SqlParameter("@BARCODE", tbxBarcode.Text));

Shared.command.SetCommand("SELECT * FROM table WHERE BARCODE_STRING = @BARCODE", parameters);

IV_Barcode barcode = new IV_Barcode();
DataTable table = barcode.Execute();