急 System.NullReferenceException: 未将对象引用设置到对象的实例。

错误详细：

异常详细信息: System.NullReferenceException: 未将对象引用设置到对象的实例。

源错误:


行 13: {
行 14: MessageInterface iMsg = MessageFactory.Create();

行 15: return iMsg.AddMessage(message);

行 16: }
行 17: }


源文件: F:\GameDesign\Bussiness\MessageBusiness.cs 行: 15


运行页面后台代码：

using System;

using System.Collections;

using System.Configuration;

using System.Data;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.IO;

using GD.Model;

using GD.DataAccess;

using GD.SystemFrameworks;

using GD.Bussiness.Message;



public partial class AddMsg : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {

        if (Session["fld_UserName"] == null)

        {

            this.Response.Write(" <script language=javascript>alert('留言成功');window.window.location.href='Login.aspx';</script> ");

            Response.Redirect("Login.aspx?message=" + Server.UrlEncode("请登录后再留言！"));

        }

        //if (!CommonClass.hasSession(Page.Session))

        //  Response.Redirect("Login.aspx?message=" + Server.UrlEncode("请登录后再留言！"));

    }



    protected void btnOK_Click(object sender, EventArgs e)

    {



        Message message = new Message();

        message.fld_UserId = Convert.ToInt32(Label1.Text);

        message.fld_Title = txtTitle.Text;

        message.fld_Content = txtDSC.Text;

        message.fld_CreatedTime = Convert.ToDateTime(DateTime.Now);



        MessageBusiness messageBusiness = new MessageBusiness();

        if (messageBusiness.AddMessage(message))

        {

            Utility.AlertMsg(this.Page, "成功");

        }

        else

        {

            Utility.AlertMsg(this.Page, "失败");

        }

     }

}

业务层代码：

namespace GD.Bussiness.Message

{

    using System;

    using System.Data;

    using System.Collections.Generic;

    using System.Text;

    using GD.Model;

    using GD.DataAccess.Message;



    public class MessageBusiness

    {

        public bool AddMessage(Message message)

        {

            MessageInterface iMsg = MessageFactory.Create();

            return iMsg.AddMessage(message);

        }

    }

}

数据处理代码：

namespace GD.DataAccess.Message

{

    using System;

    using System.Data;

    using System.Data.SqlClient;



    using GD.Model;

    using GD.SystemFrameworks;

    using GD.DataAccess.SystemFrame;



    public class MessageSqlHandle : MessageInterface

    {

        public bool AddMessage(Message message)

        {

            SQLHelper helper = new SQLHelper();

            SqlParameter[] prams = {

                                       new SqlParameter("@fld_UserId",SqlDbType.Int,8),

                                       new SqlParameter("@fld_Title",SqlDbType.NVarChar,50),

                                       new SqlParameter("@fld_Content",SqlDbType.NVarChar),

                                       new SqlParameter("@fld_CreatedTime",SqlDbType.DateTime,8)

                                   };

            prams[0].Value = message.fld_UserId;

            prams[1].Value = message.fld_Title;

            prams[2].Value = message.fld_Content;

            prams[3].Value = message.fld_CreatedTime;



            int i;

            i = helper.ExecuteNonQuery("Tb_AddMessage", prams);

            if (i == 0)

                return true;

            else

                return false;

        }

    }

}

存储过程：

ALTER PROCEDURE dbo.Tb_AddMessage

	(

	@fld_UserId int,

	@fld_Title nvarchar(100),

	@fld_Content nvarchar(max),

	@fld_CreatedTime datetime,

	@fld_Clicks int

	)

AS

BEGIN

    BEGIN TRY

    INSERT INTO Tb_Message(

       fld_UserId,

       fld_Title,

       fld_Content,

       fld_CreatedTime,

       fld_Clicks

    )VALUES(

       @fld_UserId,

       @fld_Title,

       @fld_Content,

       @fld_CreatedTime,

       @fld_Clicks

    )

    

    RETURN 0

    END TRY

    BEGIN CATCH

        RETURN ERROR_NUMBER()

    END CATCH



END

工厂反射模式 的程序 折腾了一下午了 始终解决不了 急啊~~~