I am making a small application and receiving following errors.

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i am recieving following error on the underlined line

The name 'txtname' does not exist in the current context

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace SubmitData
{
    public partial class Default : System.Web.UI.Page
    {
        submit us = new submit();
        protected void Page_Load(object sender, EventArgs e)
        {
           
        }

        protected void btnsave_Click(object sender, EventArgs e)
        {

            us.saveuserinfo(txtname.Text,txtpassword.Text, gender.SelectedValue, ddldegree.SelectedValue, ddlhobby.SelectedValue); // ERROR here
            
            Response.Redirect("About.aspx");
        }
    }
    
}

my class code is:
and i am also recieving error on marked line in this coding.

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace SubmitData
{
    public class submit
    {
         public bool saveuserinfo(String name,String password,String gender,String degree, String hobby)
        {

            using (var db = new saveinfoEntities())
            {
               userinfo usin = new userinfo();
                usin.name=name;
                usin.password=password;
                usin.gender=gender;
                usin.degree=degree;
                usin.hobby=hobby;
                db.userinfoes.InsertOnSubmit(usin); // ERROR here
                db.SubmitChanges();
                return true;
            }
        }
    }
}

Posted 11-Jan-14 5:00am

Mahwish Abdur Razzaq

Updated 11-Jan-14 5:24am

Richard MacCutchan

v2

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Comments

Karthik_Mahalingam 11-Jan-14 11:07am

what error you are getting in InsertOnSubmit ?

Mahwish Abdur Razzaq 12-Jan-14 1:15am

'System.Data.Objects.ObjectSet<submitdata.userinfo>' does not contain a definition for 'InsertOnSubmit' and no extension method 'InsertOnSubmit' accepting a first argument of type 'System.Data.Objects.ObjectSet<submitdata.userinfo>' could be found (are you missing a using directive or an assembly reference?)

Mahesh Bailwal 11-Jan-14 11:16am

This error means that compiler is not able to find any control with id "txtname". So you need to check where you have declared or defined "txtname" textbox in your code.

Mahwish Abdur Razzaq 12-Jan-14 1:16am

I am using correct control id's that exist in my code

Karthik_Mahalingam 12-Jan-14 1:42am

chk my solution

2 solutions

Solution 1

The two problems are probably pretty much the same: the compiler can't find anything of that exact name: So there are two things to check.
1) Look at your text box closely: is it's name exactly the same as "txtname"? Remember that C# is case sensitive, so "txtname" is not teh same as "txtName" or "Txtname" or "TxtName", and that it won't "invent" vowels, so it isn't the same as "textname" either!
2) If the name is exactly the same, now check the declaration line and make sure it includes the 'Runat="server"' attribute:

<asp:TextBox ID="txtname" runat="server" MaxLength="6"></asp:TextBox>

If that doesn't fix it, then we need more info - like the page as well.

Then do the same for your InsertOnSubmit method: you need to be sure that the class that db.userinfoes represents contains exactly that method name.

Posted 11-Jan-14 5:28am

OriginalGriff

Comments

Mahwish Abdur Razzaq 12-Jan-14 1:13am

Every thing is fine with the codding of controls. Here is the complete coding:

<table>

<tr>
<td class="style1"> <asp:Label ID="lblname" runat="server" Text="Name:"></td>
<td class="style2"><asp:TextBox ID="txtname" runat="server"></td>
</tr>
<tr>
<td class="style1"><asp:Label ID="lblpassword" runat="server" Text="Password:"></td>
<td class="style2"><asp:TextBox ID="txtpassword" runat="server"></td>
</tr>
<tr>
<td class="style1"><asp:Label ID="lblgender" runat="server" Text="Gender:"></td>
<td class="style2"> <asp:RadioButton ID="RadioButton1" GroupName="gender" runat="server" Text="Male" />
<asp:RadioButton ID="RadioButton2" runat="server" GroupName="gender" Text="Female" /> </td>
</tr>
<tr>
<td class="style1"><asp:Label ID="lbldegree" runat="server" Text="Degree:"></td>
<td class="style2"> <asp:DropDownList ID="ddldegree" runat="server" Height="16px"
style="margin-bottom: 0px" Width="109px">
<asp:ListItem>Matric
<asp:ListItem>F.A
<asp:ListItem>B.A
<asp:ListItem>B.Sc
<asp:ListItem>MCS
</td>
</tr>
<tr>
<td class="style1"> <asp:Label ID="lblhobby" runat="server" Text="Hobby:"></td>
<td class="style2"> <asp:DropDownList ID="ddlhobby" runat="server" Width="112px">
<asp:ListItem>Reading Books
<asp:ListItem>Collecting coins
<asp:ListItem>Grdening
<asp:ListItem>Watching TV
<asp:ListItem>Playing Games
<asp:ListItem>Home decorating
<asp:ListItem>Painting
<asp:ListItem>Listening Radio
</td>
</tr>

<tr>
<td></td>
<td class="style2">
<asp:Button
ID="btnsave" runat="server" Text="Save" onclick="btnsave_Click" /></td>

</tr>
</table>

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Karthik_Mahalingam · Accepted Answer · 2014-01-11T19:41:00

Solution 2

1) Make sure that the control txtname is available in your aspx page.
in case if it available , pls delete it and try to add it once again. make sure it is available in the designer page..

2) Please add reference to System.Data.Linq dll
right click project -> add reference -> Framework -> select System.Data.Linq.dll

Revised solution based on the OP's Conversation.
Its EDMX file ( Entity Framework )
so the syntax should be like this

C#

db.userinfoes.Add(usin);
db.SaveChanges();

Posted 11-Jan-14 19:41pm

Karthik_Mahalingam

Updated 11-Jan-14 22:31pm

v2

Comments

Mahwish Abdur Razzaq 12-Jan-14 3:06am

By Adding controls once again solves that problem but my second problem is still there.
in the reference i have System.Data.Linq not System.Data.Linq.dll

Karthik_Mahalingam 12-Jan-14 3:13am

yes that only..system.data.linq

Mahwish Abdur Razzaq 12-Jan-14 3:25am

its not working. I check it ...

Karthik_Mahalingam 12-Jan-14 3:16am

r u using dbml file or dbmx or dbml ??

Mahwish Abdur Razzaq 12-Jan-14 3:24am

edmx
i am using internal sql server provided in visual studio 2010

Karthik_Mahalingam 12-Jan-14 3:44am

try this
db.userinfoes.Add(usin);
or
db.userinfoes.AddObject(order);

Mahwish Abdur Razzaq 12-Jan-14 3:52am

Its working but I have same error in this line db.SubmitChanges();

Karthik_Mahalingam 12-Jan-14 3:58am

db.SaveChanges();

Mahwish Abdur Razzaq 12-Jan-14 4:00am

after changing db.SubmitChanges(); to db,SaveChanges();
code runs but that exception occur

Unable to update the EntitySet 'userinfo' because it has a DefiningQuery and no <insertfunction> element exists in the <modificationfunctionmapping> element to support the current operation.

Karthik_Mahalingam 12-Jan-14 4:05am

if entity set is mapped from database view or custom query or if database table doesn't have primary key.
the error will be raised..
add a primary key to that table.refresh the entity..

Mahwish Abdur Razzaq 12-Jan-14 4:24am

It done now. Thankyou very much..

Karthik_Mahalingam 12-Jan-14 4:27am

welcome Mahwish Abdur Razzaq :)