Sql server 不正确的SQL语法错误ADO.NET

当我试着运行这个时，我得到一个SqlException，消息是“关键字'PROCEDURE'附近的语法不正确”

堆栈跟踪：

at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning()
at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString)
at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async)
at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result)
at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe)
at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
at xxx.Program.Main(String[] args) in C:\xxx\Program.cs:line 121

但是，我尝试在SQL查询中直接复制SQL命令并执行它，结果成功了。（它创建了程序）

为了给您提供一些上下文，这里有一个更大的代码部分

SqlParameter stateName = new SqlParameter();
stateName.SqlDbType = SqlDbType.NVarChar;
stateName.Direction = ParameterDirection.Input;
stateName.ParameterName = "@Name";
stateName.Size = 50;
Console.Write("Enter state name: ");
stateName.Value = Console.ReadLine();
cmd.Parameters.Add(stateName);

cmd.CommandText = @"IF EXISTS (SELECT name FROM sysobjects WHERE name='FindState' AND type='P') DROP PROCEDURE FindState";
cmd.ExecuteNonQuery();
cmd.CommandText = @"CREATE PROCEDURE FindState
@Name nvarchar(50)
AS
SELECT IDState FROM State WHERE Name=@Name";
cmd.ExecuteNonQuery();
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = "FindState";
sdr = cmd.ExecuteReader();
if (sdr.HasRows)
{
  while (sdr.Read())
  {
    Console.WriteLine("ID state " + stateName.Value + " is " + sdr[0]);
  }
}
else
{
  Console.WriteLine("No such state exists");
}
sdr.Close();

试试这个：

SqlParameter stateName = new SqlParameter();
stateName.SqlDbType = SqlDbType.NVarChar;
stateName.Direction = ParameterDirection.Input;
stateName.ParameterName = "@Name";
stateName.Size = 50;
Console.Write("Enter state name: ");
stateName.Value = Console.ReadLine();
cmd.Parameters.Add(stateName);

cmd.CommandText = "IF EXISTS (SELECT name FROM sysobjects WHERE name='FindState' AND type='P') DROP PROCEDURE FindState";
cmd.ExecuteNonQuery();
cmd.CommandText = "CREATE PROCEDURE FindState
@Name nvarchar(50)
AS
BEGIN
SELECT IDState FROM State WHERE Name=@Name";
END

cmd.CommandType = CommandType.StoredProcedure;
cmd.ExecuteNonQuery();
cmd.CommandText = "FindState";

sdr = cmd.ExecuteReader();
if (sdr.HasRows)
{
  while (sdr.Read())
  {
    Console.WriteLine("ID state " + stateName.Value + " is " + sdr[0]);
  }
}
else
{
  Console.WriteLine("No such state exists");
}
sdr.Close();

---

我知道问题出在哪里了。 在创建过程之前，该参数已添加到SqlCommand。 我把这条线移了下来，现在它可以工作了

cmd.CommandText = @"CREATE PROCEDURE FindState @Name nvarchar(50) AS SELECT IDState FROM State WHERE Name=@Name";
cmd.ExecuteNonQuery();
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = "FindState";
cmd.Parameters.Add(stateName);
sdr = cmd.ExecuteReader();

---

没有erorr消息（带有堆栈跟踪），没有行号和不清理参数的代码-投票关闭。这个创建过程FindState（@Name nvarchar（50））怎么样作为SELECT IDState FROM State WHERE Name=@Name，请注意存储过程参数前后的打开和关闭花括号，在参数周围放置花括号，但不起作用。这是我建议不要“回收”

SqlCommand

对象的原因之一-每个需要执行的作业使用一个（一个用于创建过程，另一个用于调用该过程）

cmd.CommandText = @"CREATE PROCEDURE FindState @Name nvarchar(50) AS SELECT IDState FROM State WHERE Name=@Name";
cmd.ExecuteNonQuery();
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = "FindState";
cmd.Parameters.Add(stateName);
sdr = cmd.ExecuteReader();