Question

怎样在C#中调用SQL的存储过程

Answer 1

1)执行一个没有参数的存储过程的代码如下：
SqlConnection conn=new SqlConnection(“connectionString”);
SqlDataAdapter da = new SqlDataAdapter();
da.selectCommand = new SqlCommand();
da.selectCommand.Connection = conn;
da.selectCommand.CommandText = "NameOfProcedure";
da.selectCommand.CommandType = CommandType.StoredProcedure;
(2)执行一个有参数的存储过程的代码如下
SqlConnection conn=new SqlConnection(“connectionString”);
SqlDataAdapter da = new SqlDataAdapter();
da.selectCommand = new SqlCommand();
da.selectCommand.Connection = conn;
da.selectCommand.CommandText = "NameOfProcedure";
da.selectCommand.CommandType = CommandType.StoredProcedure;
param = new SqlParameter("@ParameterName", SqlDbType.DateTime);
param.Direction = ParameterDirection.Input;
param.Value = Convert.ToDateTime(inputdate);
da.selectCommand.Parameters.Add(param);
若需要添加输出参数：
param = new SqlParameter("@ParameterName", SqlDbType.DateTime);
param.Direction = ParameterDirection.Output;
param.Value = Convert.ToDateTime(inputdate);
da.selectCommand.Parameters.Add(param);
若要获得参储过程的返回值：
param = new SqlParameter("@ParameterName", SqlDbType.DateTime);
param.Direction = ParameterDirection.ReturnValue;