Question

如何将存储过程与参数一起作为字符串传递给函数？

我想这个代码，但没有运气..

这是业务访问层的代码

try 
{ 
    string Query_string = "SP_InsertOffer_Tab @offer_name ='" + this.offer_name +"', @offer_price = " + this.offer_price + ",@start_date = '" + this.start_date + 
"',@end_date = '" + this.end_date + "'"; 

    int result = DbAcess.Insert_Query(Query_string); 
    return result; 
} 
catch (Exception ex) 
{ 
    throw ex; 
} 
finally 
{ 
    DbAcess = null; 
} 

数据库层的代码是相反如下

public int Insert_Query(string strSQL) 
{ 
    SqlConnection con = new SqlConnection(); 
    con = OpenConnection(); 

    try 
    { 
     sqlcmd = new SqlCommand(); 
     sqlcmd.Connection = con; 
     sqlcmd.CommandType = CommandType.StoredProcedure; 
     sqlcmd.CommandText = strSQL; 

     int Result = sqlcmd.ExecuteNonQuery(); 
     return Result; 
    } 
    catch (Exception ex) 
    { 
     throw ex; 
    } 
    finally 
    { 
     con.Close(); 
    } 
} 

Answer 1

传递STRSQL作为的CommandText，其中strSQL是您在第一个代码块（我认为...）中创建的字符串，只需传递SP名称作为CommandText，然后将参数添加到您的sqlcmd对象。

SqlParameter p = new SqlParameter("@ParameterName", parametervalue)); 
sqlcmd.Parameters.Add(p); 

Answer 2

只是为了尝试解决你的问题，但是要小心，这种方法是很危险的，不推荐在SQL注入问题。

string Query_string = "EXEC SP_InsertOffer_Tab @offer_name ='" + 
      this.offer_name +"', @offer_price = " + 
      this.offer_price + ",@start_date = '" + 
      this.start_date + "',@end_date = '" + this.end_date + "'"; 

并将CommandType更改为Text。

更好的方法是改变Insert_Query方法

public int Insert_Query(string strSQL, SqlParameter[] prm) 
{ 
    using(SqlConnection con = OpenConnection()) 
    { 
     sqlcmd = new SqlCommand(strSql, con); 
     sqlcmd.CommandType = CommandType.StoredProcedure; 
     sqlcmd.Parameters.AddRange(prm) 
     int Result = sqlcmd.ExecuteNonQuery(); 
     return Result; 
    } 
} 

然后调用它以这种方式

SqlParameter[] prms = new SqlParameter[] 
{ 
    new SqlParameter("@offer_name", SqlDbType.NVarChar), 
    new SqlParameter("@offer_price", SqlDbType.Money), 
    new SqlParameter("@start_date", SqlDbType.SmallDateTime), 
    new SqlParameter("@end_date", SqlDbType.SmallDateTime) 
}; 
prms[0].Value = this.offer_name; 
prms[1].Value = this.offer_price; 
prms[2].Value = this.start_date; 
prms[3].Value = this.end_date; 
int result = DbAcess.Insert_Query(Query_string, prms);