problem in try cath & show information

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hello
I wrote bellow codes in asp.net2005 for take information from DB via sql.2005

C#

try
        {
            GridView2.Visible = true;
            SqlConnection con = new SqlConnection("Data Source=.;Initial Catalog=NezamPezeshki;Integrated Security=True");
            SqlDataSource1.SelectCommand = "SELECT * FROM [ViewSParvandeh] WHERE (([Dfamily] LIKE '%' + @Dfamily + '%') OR ([Dname] LIKE '%' + @Dname + '%') OR ([DNum] LIKE '%' + @DNum + '%'))";
            SqlDataSource1.SelectParameters.Clear();
            SqlDataSource1.SelectParameters.Add("DNum", TextBox1.Text);
            SqlDataSource1.SelectParameters.Add("Dname", TextBox2.Text);
            SqlDataSource1.SelectParameters.Add("Dfamily", TextBox3.Text);
            SqlDataSource1.SelectParameters.Add("MelliCode", TextBox4.Text);
            SqlDataSource1.SelectParameters.Add("Expr1", TextBox5.Text);
            SqlDataSource1.SelectParameters.Add("MajorName", TextBox6.Text);
            SqlDataSource1.SelectParameters.Add("IdNum", TextBox7.Text);
            SqlDataSource1.SelectParameters.Add("CityParvaneh", DropDownList2.Text);

            GridView2.DataBind();

          

        }
        catch
        {
            Label10.Text = "no register these information";

        }

BUT I HAVE 2 PROBLEMs:
1- why try cath dosent work?
2- I should fill three of textbox for show info to me BUT idont like this,sometimes I want blank some of them,but in this way doesnt show to me anything!!!!!

please help me
thanks

Posted 22-Jun-12 1:54am

veusk

Updated 22-Jun-12 1:55am

Prasad_Kulkarni

v2

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Comments

Sandeep Mewara 22-Jun-12 8:02am

What do you mean 'try-catch' doesn't work?

Prosan 22-Jun-12 9:17am

where are you exceuting command.

3 solutions

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Prasad_Kulkarni · Answer 1 · 2012-06-22T01:56:00

Solution 1

Try this:

C#

catch(exception ex)
      {
          Label10.Text = ex.message + "Your message here";

      }

Posted 22-Jun-12 1:56am

Prasad_Kulkarni

v2

Comments

veusk 22-Jun-12 8:24am

thanks
but unfortunately the parts of catch no work,again

Rajeev Jayaram 22-Jun-12 8:50am

May be the try block didn't meet with an exception as you didn't execute the sqlcommand. See my answer.

Rajeev Jayaram · Answer 2 · 2012-06-22T02:45:00

Solution 2

Before binding the data to GridView, you should execute the sqlcommand and then use dataadapter to fill the dataset and then set the dataset's datatable as the datasource for the GridView.

Posted 22-Jun-12 2:45am

Rajeev Jayaram

Prosan · Answer 3 · 2012-06-22T03:21:00

Solution 3

in try catch block write code as per solution 1

C#

catch(exception ex)
      {
          Label10.Text = ex.message + "Your message here";

      }

i think when you bind gridview you are not executing command so no data coming. and you have not define the datasource of gridview.

Posted 22-Jun-12 3:21am

Prosan