对象referance未设置为对象的实例 [英] Object referance not set to an instance of an object

问题描述

private void GridDataSave()
   {
       foreach (GridViewRow s in grdqutotation.Rows)
       {
           ////TextBox id = (TextBox)grdqutotation.Rows[s.RowIndex].FindControl("txt_id");

           //TextBox srno = (TextBox)grdqutotation.Rows[s.RowIndex].FindControl("txt_srno");

           //TextBox description = (TextBox)grdqutotation.Rows[s.RowIndex].FindControl("txt_desc");

           //TextBox Quantity = (TextBox)grdqutotation.Rows[s.RowIndex].FindControl("txt_Qty");

           //TextBox Units = (TextBox)grdqutotation.Rows[s.RowIndex].FindControl("txt_Unit");

           //TextBox Rate = (TextBox)grdqutotation.Rows[s.RowIndex].FindControl("txt_Rate");

           //TextBox Amount = (TextBox)grdqutotation.Rows[s.RowIndex].FindControl("txt_amount");
           Tbl_SubFinalQuotation a = new Tbl_SubFinalQuotation();
           ////  TextBox id = (TextBox)s.FindControl("txt_id");
           a.Quto_No = txtQno.Text;
           ////a.id = Convert.ToInt32(s.Cells[0].Text);
           TextBox srno = (TextBox)s.FindControl("txt_srno");
           //Decimal p = Convert.ToDecimal((srno.Text));
           TextBox description = (TextBox)s.FindControl("txt_desc");
          // string q = description.Text;
           TextBox Quantity = (TextBox)s.FindControl("txt_Qty");
           //Decimal r = Convert.ToDecimal((Quantity.Text));
           TextBox Units = (TextBox)s.FindControl("txt_Unit");
          // string t = Units.Text;
           TextBox Rate = (TextBox)s.FindControl("txt_Rate");
          // Decimal u = Convert.ToDecimal((Rate.Text));
           TextBox Amount = (TextBox)s.FindControl("txt_amount");
         //  Decimal v = Convert.ToDecimal((Amount.Text));

           a.srno = Convert.ToDecimal (srno.Text );
           a.productName = description .Text ;
           a.Quantity = Convert.ToDecimal (Quantity .Text );
           a.Units = Units .Text ;
           a.Rate = Convert.ToDecimal (Rate .Text );
           a.Amount = Convert.ToDecimal (Amount .Text );

           context.Tbl_SubFinalQuotations.InsertOnSubmit(a);
           context.SubmitChanges();
           a = null;
       }
   }

我的尝试：

What I have tried:

private void GridDataSave()
    {
        foreach (GridViewRow s in grdqutotation.Rows)
        {
            ////TextBox id = (TextBox)grdqutotation.Rows[s.RowIndex].FindControl("txt_id");

            //TextBox srno = (TextBox)grdqutotation.Rows[s.RowIndex].FindControl("txt_srno");

            //TextBox description = (TextBox)grdqutotation.Rows[s.RowIndex].FindControl("txt_desc");

            //TextBox Quantity = (TextBox)grdqutotation.Rows[s.RowIndex].FindControl("txt_Qty");

            //TextBox Units = (TextBox)grdqutotation.Rows[s.RowIndex].FindControl("txt_Unit");

            //TextBox Rate = (TextBox)grdqutotation.Rows[s.RowIndex].FindControl("txt_Rate");

            //TextBox Amount = (TextBox)grdqutotation.Rows[s.RowIndex].FindControl("txt_amount");
            Tbl_SubFinalQuotation a = new Tbl_SubFinalQuotation();
            ////  TextBox id = (TextBox)s.FindControl("txt_id");                   
            a.Quto_No = txtQno.Text;
            ////a.id = Convert.ToInt32(s.Cells[0].Text);
            TextBox srno = (TextBox)s.FindControl("txt_srno");
            //Decimal p = Convert.ToDecimal((srno.Text));
            TextBox description = (TextBox)s.FindControl("txt_desc");
           // string q = description.Text;
            TextBox Quantity = (TextBox)s.FindControl("txt_Qty");
            //Decimal r = Convert.ToDecimal((Quantity.Text));
            TextBox Units = (TextBox)s.FindControl("txt_Unit");
           // string t = Units.Text;
            TextBox Rate = (TextBox)s.FindControl("txt_Rate");
           // Decimal u = Convert.ToDecimal((Rate.Text));
            TextBox Amount = (TextBox)s.FindControl("txt_amount");
          //  Decimal v = Convert.ToDecimal((Amount.Text));

            a.srno = Convert.ToDecimal (srno.Text );
            a.productName = description .Text ;
            a.Quantity = Convert.ToDecimal (Quantity .Text );
            a.Units = Units .Text ;
            a.Rate = Convert.ToDecimal (Rate .Text );
            a.Amount = Convert.ToDecimal (Amount .Text );

            context.Tbl_SubFinalQuotations.InsertOnSubmit(a);
            context.SubmitChanges();
            a = null;
        }
    }

推荐答案

在调试器中运行代码，Visual Studio将停在违规行上，将鼠标移到该行上并在工具提示中查看哪个对象 null 。

Run your code in the debugger, Visual Studio will stop on the offending line, move your mouse over the line and see in the tool tips which object is null.

这篇关于对象referance未设置为对象的实例的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！