Question

我有一个基本的存储过程

ALTER PROCEDURE [dbo].[GetOrdersEmailContent] 
    @Name nvarchar(50),
    @Body nvarchar(2000) OUTPUT
AS
BEGIN
    --SET NOCOUNT ON
    SET @Body = (SELECT Content 
                 FROM ORDERS_tblEmailContent
                 WHERE Name = @Name)
END

我使用以下代码从C＃调用

using (DbConnection)
{
    DbConnection.Open();

    using (OdbcCommand DbCommand = DbConnection.CreateCommand())
    {
        DbCommand.CommandType = CommandType.StoredProcedure;
        DbCommand.CommandText = " GetOrdersEmailContent";

        DbCommand.Parameters.Add("@Name", OdbcType.NVarChar, 50);
        DbCommand.Parameters["@Name"].Value = templateName;
        DbCommand.Parameters["@Name"].Direction = ParameterDirection.Input;

        DbCommand.Parameters.Add("@Body", OdbcType.NVarChar, 2000);
        DbCommand.Parameters["@Body"].Value = DBNull.Value;
        DbCommand.Parameters["@Body"].Direction = ParameterDirection.Output;

        DbCommand.ExecuteNonQuery();

        emailBody = DbCommand.Parameters["@Body"].Value.ToString();   
    }
}

DbConnection.Close();

当ExecuteNonQuery运行时，它会返回以下错误：

错误[42000] [Microsoft] [SQL Server Native Client 11.0] [SQL Server]过程或函数＆＃39; GetOrdersEmailContent＆＃39;期望参数＆＃39; @ Name＆＃39;，这是未提供的。

任何人都可以提供建议吗？我查看了其他类似的问题，但没有一个解决方案适用或解决问题

Answer 1

考虑templateName没有空。无需为@Name指定方向：

using (DbConnection)
        {
            DbConnection.Open();
            using (OdbcCommand DbCommand = DbConnection.CreateCommand())
            {
                DbCommand.CommandType = CommandType.StoredProcedure;
                DbCommand.CommandText = " GetOrdersEmailContent";

                DbCommand.Parameters.Add("@Name", OdbcType.NVarChar, 50);
                DbCommand.Parameters["@Name"].Value = templateName;

                DbCommand.Parameters.Add("@Body", OdbcType.NVarChar, 2000);
                DbCommand.Parameters["@Body"].Value = DBNull.Value;
                DbCommand.Parameters["@Body"].Direction = ParameterDirection.Output;

                DbCommand.ExecuteNonQuery();

                emailBody = DbCommand.Parameters["@Body"].Value.ToString();   
            }
        }
        DbConnection.Close();

C＃Odbc存储过程调用 - 过程或函数需要未提供的参数

1 个答案: