解析字符串：输入字符串的格式不正确。 ＃

Question

I'm trying to run a stored procedure that is requiring an int to work correctly. I pull an "ID" from a datagrid and then am trying to parse the int to allow the procedure to run, but am getting the error mentioned in the title. Any thoughts on a better way to do this?

<asp:BoundColumn DataField="ID" Visible="true"></asp:BoundColumn>

<asp:Button ID="btnMarkComplete" Text="Mark Complete" runat="server" CommandArgument='<$# Eval("ID") %>' OnClick="BtnMarkCompleteClick"/>
                        </ItemTemplate>


int iD = Convert.ToInt32(d.CommandArgument.ToString());

Answer 1

In answer to your question, "is there a better way to do this"?

Yes, and it's called TryParse :

int iD = 0;

if(Int32.TryParse(d.CommandArgument.ToString(), out iD))
{
   // Do something with iD
}

Explanation

You're implying (using a basic Convert method) that the input can be converted to an Int32 , which is why you get an exception when it can't. With the way I've suggested above, you're simply trying to parse it. TryParse returns a boolean you can then evaluate to decide on a path of execution.

Answer 2

There's a typo there to start:

<$# Eval("ID") %>

Should be

<%# Eval("ID") %>

So you are trying to convert the string value <$# Eval("ID") %> to an integer which will fail and throw the error you are receiving. The field won't bind to ID because of the typo.