every time Page_Load event called?

Question

I have a master page in asp.net C# under it i have a content page.
when i take button on master page then on runtime on button click content form load event called on button click.
on every button click it happened.
any body face this type of problem ?
why?

Suthish Nair · Answer

Hi vikas if problem solved please mark as answer...

Vikas Ahlawat · Answer

Thanks for writing article.

Suthish Nair · Answer

another way: http://www.c-sharpcorner.com/UploadFile/suthish_nair/3781/Default.aspx?ArticleID=8d6a6498-9ead-481b-997f-3d264369d509 but theres some security issues.

Vikas Ahlawat · Answer

Hi Suthish My problem is solved by this http://dotnetslackers.com/Events/re-23154_Capture_Master_Page_Events_in_Content_Pages_ASP_NET_2_0.aspx article but it is very difficult Which solution you give me it never if (Request.QueryString[formname] != null) { } never true you can also read this article. if any other easy solution then please explain. Thanks any way i m marking it answer.

Mahesh Chand · Answer

Yes. You need to check if QueryString value is not null. if (Request.QueryString[formname] != null) { }

karthick kumar · Answer

hi You can check some conditions like if( Request.QueryString[formname].ToString()!=dbNull.ToString()) { string formvalue = Request.QueryString[formname].ToString(); }

Suthish Nair · Answer

might this helps you... file attached..

Vikas Ahlawat · Answer

Hi In this query sting always null because contant form load event called before master page button click event. i want to display query sting value when content form load event call

Suthish Nair · Answer

same project uploaded...

Vikas Ahlawat · Answer

Hi sunthsh Can you give example of passing query string from master page(button click event) to content page

Suthish Nair · Answer

it seems working for me.. as suggested on earlier forum put breakpoints on every page and check the error. I think something else causing the problem.

Vikas Ahlawat · Answer

error in this: string formvalue = Request.QueryString[formname].ToString(); ///Object reference not set to an instance of an object. //when i click on the button then error occur here because button click event protected void btnCategory_Click(object sender EventArgs e) { Response.Redirect(~/Forms/frmView.aspx?formname=Category); } not called and when i make comment to these three lines then button click event ( btnCategory_Click) execute successfully. you can help me by check it http://www.c-sharpcorner.com/Forums/UploadFile/96725

Suthish Nair · Answer

on which line you getting error...

Vikas Ahlawat · Answer

I have already try if (!IsPostBack) {}

Suthish Nair · Answer

you need : if (!IsPostBack) {}

Vikas Ahlawat · Answer

Master page button click event code protected void btnCategory_Click(object sender EventArgs e) { Response.Redirect(~/Forms/frmView.aspx?formname=Category); } content page onload even code protected void Page_Load(object sender EventArgs e) { txtFromDate.Text = DateTime.Now.AddMonths(-1).ToString(MM/dd/yyyy); txtToDate.Text = DateTime.Now.ToString(MM/dd/yyyy); //Session[is_starting]= if (Session[is_starting] == yes) { RefreshData(Category); Session[is_starting] = null; } else { string formvalue = Request.QueryString[formname].ToString(); //when i click on the button then error occur here because button click event not called and when i make comment to these three lines then button click event ( btnCategory_Click) execute successfully. Response.Write( alert('Value of query String is ='+' + formvalue + ') ); RefreshData(formvalue); // RefreshData(StudentProspects); } //Response.Write( alert('Value of query String is ='+' + formvalue + ') ); }

Suthish Nair · Answer

You must know about Master Page and Content Form hierarchy. readon: http://odetocode.com/Articles/450.aspx