AutoPostBack issue in DropDownList Event

In side LoadProductForGridView(), you arereading the valuefrom ddlProductType.

If youcall the function on Page_Load() inside !IsPostBack, ddlProductType won't have any value selected.

If you call LoadProductForGridView() functionon SelectedIndexChanged,it will, but instead of using ddlProductType.SelectedValue,you need to use as follows:

string selectedProduct =((DropdownList)sender).SelectedValue;

then use selectProduct value to pass @as_ProductID parameter value to your stored procedure.

Hope that helps,

Thanks,

Hi,

 

use this with below code-

 

protected void Page_Load(object sender, EventArgs e) 
{ 
   if (!IsPostBack) 
  { 
    LoadProductForGridView(); //your function called here
  }
}

 

use ispostback on page load event. your are doing wrong

 

 

protected void Page_Load(object sender, EventArgs e) 
{ 
   if (!IsPostBack) 
  { 
    LoadProductForGridView(); //your function
  }
}

 

  #Upendra Pratap,

 

 

I did as per your suggestion but the issue still not solved, I set AutoPostBack of DropDownList =True and it always postback into the first row of the DropDownList, i.e the selectedValue of DropDownList always being ProductID=1.

 

modified code :-

 

 

Try to call your function in isPostback.