Dropdown list seleceted value

Question

when i select the value from drop down these error come ... input string was not in a correct format Line 26: int a = Convert.ToInt32(ddlAccount.SelectedValue); plz help me.. thanks

Imran Bashir · Answer

no the value in dropdown is int that coming from database that is the primary key im using this in page load event ...

Francis · Answer

I think either It is null or Non Integer number @Ashiwani Sharma theConvert.ToInt32 will handleNULL values. So it is not an issue.I guessthe userwill try to pass the Non-Integer value.

Ashiwani Sharma · Answer

Hi Imran Debug your programm and check what value is coming on  ddlAccount.SelectedValue I think either It is null or Non Integer number.

Ravi Sangtani · Answer

Hi imran bashir In Dropdown list your list value must be in number or digit like 568 98746 etc. If in Dropdown list any character or symbol is their in your string like 59r97 78945# etc. It will give you error string was not in correct format. If your string was empty then also it will give you error. So your string should be in correct format in digit only not in character. (Ravi D. Sangtani)

Francis · Answer

Most probably you will receive this error because you passed the value inside the convert.ToInt32 function is not a valid one. Like you may pass a string with in that function like below: int c=Convert.ToInt32( 10a ); I got the same error for the above statement. I would suggest you take a close look what is the value return by  ddlAccount.SelectedValue.

Krishna Rajput Singh · Answer

Thank you for writing below links i hope helpful for you..:) http://www.aspdotnet-suresh.com/2015/06/set-dropdownlist-selected-value-text-in-aspnet-on-page-load-code-behind.html http://stackoverflow.com/questions/1249394/how-to-select-a-dropdown-list-item-by-value-programatically http://www.aspsnippets.com/Articles/Get-selected-value-of-HTML-Select-DropDownList-in-ASPNet-code-behind-using-C-and-VBNet.aspx https://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.dropdownlist.selectedindex(v=vs.110).aspx