Question

property in my mainClass

  public Int64 DetailID
        {
            get { return bintDetailID; }
            set { bintDetailID = value; }
        }

myClass

mainClass obj=new mainClass();
obj.DetailID = int.Parse(e.CommandArgument.ToString());

aspx page

<asp:Button ID="btnEdit" Text="Edit" CommandArgument='<%#Eval("DetailID") %>'
CausesValidation="false" CommandName="Edit" Visible="false" runat="server" OnCommand="btnEdit_Click"/>

Isn’t this how u convert string to int ?

int.Parse(e.CommandArgument.ToString());

Whats wrong ? plz help..thnx

Answer 1

Assuming that your Button object is NOT within a databound control like a grid / repeater,
AND If you are trying to Bind the button using the DetailID property, check the following:-

1. Assuming your button is in testPage.aspx, the codebehind class for testPage.aspx i.e class testPage should have a property of type Int64 called DetailID.
   eg : Int64 DetailID get; set;

2. Assuming mainClass is some custom class of yours, somewhere in Page_Load, you will have to do a this.DetailID = mainClassObject.DetailID; where this = instance of your page.

3. In your page_load method, additionally, you will have to do a Page.DataBind(). This is because a non-databound control like button does not have its own DataBind() method.

Note 1: If your testPage.DetailID = Int32 / int, you will need to do the conversion in the setter method or before that as y0ur mainClass is an Int64

Note 2: From your comments, you seem to be saying that Int64 doesnt exist. Which is weird!
Try using the fully qualified name i.e System.Int64 and see if that works!