C# 电子邮件地址不会从c中的存储过程返回#

这些值不会从存储过程传递到

EmailTO

和

EmailFrom

，其显示为NULL。所以我无法发送电子邮件。如果我在

To

和

From

位置手动输入电子邮件地址，则电子邮件将以smtp形式发送，但不会从存储过程读取

请帮助我检索值：

这是我的存储过程，数据存储在表中：

    Set @EmailFrom =(SELECT EmailFrom FROM tblEmailDesign where EmailID = @EmailID )
    Set @EmailTo =(SELECT EmailTo FROM tblEmailDesign where EmailId = @EmailID )

    Insert into tblEmailsend([EmailID][EmailSubject],[EmailTo],[EmailFrom],[EmailBody],[EmailComment])
select @EmailID @EmailFrom,@EmailTo,[EmailSubject],[EmailBody],@EmailComment from tblEmaildesign
where EmailID=@EmailID

END

这是我在C#中的调用代码：

---

执行存储过程后，需要从存储过程中获取输出参数值：

protected void submit(object sender, EventArgs e)

    using (SqlCommand scom = new SqlCommand("spx_Send_Status_Mail", new SqlConnection(ConfigurationManager.ConnectionStrings["EPOCHSConnectionString"].ConnectionString))) {

        scom.CommandType =CommandType.StoredProcedure;    
        SqlParameter EmailTo = new SqlParameter("@EmailTo", SqlDbType.NVarChar, 200);
        EmailTo.Direction = ParameterDirection.Output;
        scom.Parameters.Add(EmailTo);    
        SqlParameter EmailFrom = new SqlParameter("@EmailFrom", SqlDbType.NVarChar, 200);
        EmailFrom.Direction = ParameterDirection.Output;
        scom.Parameters.Add(EmailFrom);

        try {
            scom.Connection.Open();
            scom.ExecuteNonQuery();
            scom.ExecuteReader(CommandBehavior.CloseConnection);
        } finally {
            scom.Connection.Close();
        }

        mail message = new mail();

        //Get output parameters after executing query
        string to = EmailTo.Value.ToString();
        string from = EmailFrom.Value.ToString();
        //Pass To and From email addresses to the ESendmail function
        mailsystem.Esendmail(to,from);
    }
}

---

我这样做了，但仍然没有传递值。我们将感谢您提供更多帮助。您可以更具体地说，当您逐步完成代码时，您是否成功地检索了输出值？如果没有，则运行SQL事件探查器并检查返回的值。很难说，因为SQL查询不正确，@EmailId:

select@EmailId@EmailFrom之后缺少一个逗号，@EmailTo

我想在这里格式化代码时，我遗漏了逗号，但在我的存储过程中，我正确地执行了每个查询，我可以看到存储在那里的值。我遇到了以下错误：转换nvarchar值时转换失败'myname@gmail.com'到数据类型int@nitharaj愿意接受吗？这样每个人都知道你的问题问题解决了吗？干杯：

protected void submit(object sender, EventArgs e)

    using (SqlCommand scom = new SqlCommand("spx_Send_Status_Mail", new SqlConnection(ConfigurationManager.ConnectionStrings["EPOCHSConnectionString"].ConnectionString))) {

        scom.CommandType =CommandType.StoredProcedure;    
        SqlParameter EmailTo = new SqlParameter("@EmailTo", SqlDbType.NVarChar, 200);
        EmailTo.Direction = ParameterDirection.Output;
        scom.Parameters.Add(EmailTo);    
        SqlParameter EmailFrom = new SqlParameter("@EmailFrom", SqlDbType.NVarChar, 200);
        EmailFrom.Direction = ParameterDirection.Output;
        scom.Parameters.Add(EmailFrom);

        try {
            scom.Connection.Open();
            scom.ExecuteNonQuery();
            scom.ExecuteReader(CommandBehavior.CloseConnection);
        } finally {
            scom.Connection.Close();
        }

        mail message = new mail();

        //Get output parameters after executing query
        string to = EmailTo.Value.ToString();
        string from = EmailFrom.Value.ToString();
        //Pass To and From email addresses to the ESendmail function
        mailsystem.Esendmail(to,from);
    }
}