instance failure in con.open()

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i have written this code

C#

static string _con = ConfigurationManager.ConnectionStrings["tours_travel"].ConnectionString;
   SqlConnection con = new SqlConnection(_con);

but while using with stored procedure there is an error of instance failure on

cmd.Connection = con;

C#

cmd.CommandText = "usp_packageinsert";
       cmd.CommandType = CommandType.StoredProcedure;
       cmd.Parameters.AddWithValue("@package_name", txtpname.Text);
       cmd.Parameters.AddWithValue("@package_description", txtpdesc.Text);
       int check = 0;
       cmd.Connection = con;
       con.Open();
       check = cmd.ExecuteNonQuery();
       con.Close();
       if (check == 1)
       {
           lblmsg.Visible = true;
           lblmsg.Text = "Package added";
       }

Posted 3-Apr-13 21:29pm

Member 9671810

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uspatel 4-Apr-13 3:41am

share your connection string you have uses.....

Member 9671810 4-Apr-13 3:44am

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Anurag Sinha V · Answer 1 · 2013-04-03T21:39:00

Solution 1

Hi,

Why are you using static string variable in the first place?
Code your connection string something as below:

C#

SqlConnection xconn = new SqlConnection(ConfigurationManager.ConnectionString["connectionStrings"].ToString());

where connectionStrings is defined in the config file. You might wana also check your Data Source name in the config file.
Try these stuffs and then debug, it should work.

-Anurag

Posted 3-Apr-13 21:39pm

Anurag Sinha V

Comments

Member 9671810 4-Apr-13 3:48am

i have tried yours but same error.
i have my connection string in web config.. and i used static just cauze i have declared it as global i mean in class.

Anurag Sinha V 4-Apr-13 4:03am

Hmm..thanks for the info..
I guess you need to remove the double slash from your connection string.
Instead of EXPERT-17A055DD\\SQLEXPRESS, it should be EXPERT-17A055DD\SQLEXPRESS...
check the following link:http://stackoverflow.com/questions/1830824/instance-failure-in-asp-net

-Anurag

Member 9671810 4-Apr-13 9:11am

oh.. thanx.. a lot... :)

Anurag Sinha V 4-Apr-13 9:31am

np..enjoy..

-anurag