使用ADO.Net检索数据时出现问题

Question

从我的应用程序

我正在使用ADO.Net类检索数据。

 private DataSet GetData(string clientconstr,string actionparam,string userid)
 {
            DataSet dsData = null;

                SqlParameter[] objSqlParam = new SqlParameter[2];
                objSqlParam[0] = new SqlParameter("@ACTION", SqlDbType.VarChar, 50);
                objSqlParam[0].Value = actionparam;
                objSqlParam[1] = new SqlParameter("@USERID", SqlDbType.VarChar, 100);
                objSqlParam[1].Value = userid;

                dbc = new dbClass(clientconstr);
                dsData = dbc.ExecuteNonQuery("SPLINV", "SP", objSqlParam);
}

class dbClass
    {
        SqlCommand cmd = null;
        SqlConnection con = null;
        SqlDataAdapter da = null;
        string connectionstring = "";

        public dbClass(string conStr)
        {
            connectionstring = conStr;
        }

        public DataSet ExecuteNonQuery(string query, string querytype, SqlParameter[] objArrSqlParamas)
        {
            DataSet ds = null; 

            try
            {
                con = new SqlConnection(connectionstring);
                con.Open();

                cmd = new SqlCommand();
                cmd.Connection = con;

                if (querytype.Equals("sp"))
                    cmd.CommandType = CommandType.StoredProcedure;
                else
                    cmd.CommandType = CommandType.Text;

                cmd.CommandText = query;
                cmd.CommandTimeout = 300;

                if (objArrSqlParamas != null)
                {
                    for(int idx=0;idx<objArrSqlParamas.Length;idx++)
                        cmd.Parameters.Add(objArrSqlParamas[idx]);
                }

                da = new SqlDataAdapter(cmd);
                ds = new DataSet();
                da.Fill(ds);

            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (cmd != null)
                    cmd.Dispose();
                if (da != null)
                    da.Dispose();
                if (con != null)
                {
                    con.Dispose();
                    con.Close();
                }
            }

            return ds;
        }
}

即使我将所有参数传递给SP＆＃34; SPLINV＆＃34;，我在GetData函数中遇到错误。

  

System.Data.SqlClient.SqlException：过程或函数＆＃39; SPLINV＆＃39;   期望参数＆＃39; @ ACTION＆＃39;，这是未提供的。

＆＃34; SPLINV＆＃34; Sp创建如下。

CREATE PROCEDURE SPLINV
(      
@ACTION VARCHAR(50),      
@USERID VARCHAR(100)      
) 

我只是想知道为什么会发生这个问题，即使我将所有参数传递给SP以及如何解决这个问题。

Answer 1

问题在于： - if（querytype.Equals（“sp”））

等于区分大小写。您正在传递“SP”并检查“sp”。所以命令以文本形式执行。请仔细阅读更改的代码。

 private DataSet GetData(string clientconstr,string actionparam,string userid)
 {
            DataSet dsData = null;

                SqlParameter[] objSqlParam = new SqlParameter[2];
                objSqlParam[0] = new SqlParameter("@ACTION", SqlDbType.VarChar, 50);
                objSqlParam[0].Value = actionparam;
                objSqlParam[1] = new SqlParameter("@USERID", SqlDbType.VarChar, 100);
                objSqlParam[1].Value = userid;

                dbc = new dbClass(clientconstr);
                dsData = dbc.ExecuteNonQuery("SPLINV", "SP", objSqlParam);
}

class dbClass
    {
        SqlCommand cmd = null;
        SqlConnection con = null;
        SqlDataAdapter da = null;
        string connectionstring = "";

        public dbClass(string conStr)
        {
            connectionstring = conStr;
        }

        public DataSet ExecuteNonQuery(string query, string querytype, SqlParameter[] objArrSqlParamas)
        {
            DataSet ds = null; 

            try
            {
                con = new SqlConnection(connectionstring);
                con.Open();

                cmd = new SqlCommand();
                cmd.Connection = con;

                if (querytype.Equals("SP"))
                    cmd.CommandType = CommandType.StoredProcedure;
                else
                    cmd.CommandType = CommandType.Text;

                cmd.CommandText = query;
                cmd.CommandTimeout = 300;

                if (objArrSqlParamas != null)
                {
                    for(int idx=0;idx<objArrSqlParamas.Length;idx++)
                        cmd.Parameters.Add(objArrSqlParamas[idx]);
                }

                da = new SqlDataAdapter(cmd);
                ds = new DataSet();
                da.Fill(ds);

            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                if (cmd != null)
                    cmd.Dispose();
                if (da != null)
                    da.Dispose();
                if (con != null)
                {
                    con.Dispose();
                    con.Close();
                }
            }

            return ds;
        }
}

Answer 2

您是否尝试将参数说明设为“输入”？

objSqlParam [0] .Direction = ParameterDirection.Input; objSqlParam [1] .Direction = ParameterDirection.Input;