Solved

Cast object to int in C#

Posted on 2007-03-24
3
13,244 Views
Last Modified: 2008-01-09
Let's review the following:
    protected bool InvalidRangeOrName(object PlayerName, object Rank)
    {
        string name = (string)PlayerName;
        int rank = (int)Rank;
        if (name.Length == 0){
            lblMsg.Text = "Player Name is required";
            return true;
        }
         if (rank < 1 || rank > 25){
             lblMsg.Text = "Rank must be between 1 and 25";
             return true;
        }
        return false;
    }

    protected void FormView1_ItemInserting(object sender, FormViewInsertEventArgs e)
    {
        if (InvalidRangeOrName(e.Values["PlayerName"], e.Values["Rank"]))
            e.Cancel = true;
    }

    protected void FormView1_ItemUpdating(object sender, FormViewUpdateEventArgs e)
    {
         if (InvalidRangeOrName(e.NewValues["PlayerName"], e.NewValues["Rank"]))
            e.Cancel = true;
    }

At runtime an error {"Specified cast is not valid."} shows at: int rank = (int)Rank;

Please advise.
0
Comment
Question by:ksfok
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 29

Assisted Solution

by:Gautham Janardhan
Gautham Janardhan earned 150 total points
ID: 18787469
u sure this object return int always 'Rank' ?

try this before casting

MessageBox.Show(Rank.GetType());
MessageBox.Show(Rank.ToString());
0
 
LVL 19

Assisted Solution

by:Desp
Desp earned 150 total points
ID: 18787502
Try to debug the code to see whats inside "Rank" in FormViewInsertEventArgs ... did you try Convert.toint32 ?
0
 
LVL 15

Accepted Solution

by:
stanscott2 earned 200 total points
ID: 18789041
The FormViewInsertEventArgs  e.Values is made up of DictionaryEntry objects.  If I wanted to iterate through e, I would do this:

Foreach (DictionaryEntry entry in e.Values) {
  String desc = entry.Key.ToString();
  String val = entry.Value;
}

Each DictionaryEntry, as you can see, has a Key and a Value.  Based on this logic, the Rank you're getting from this:

e.Values["Rank"]

comes back as a string, not an object.  If this is right, the arguments for your boolean test should be strings, not objects.  If they are objects, then you should explicitly convert Rank to a string before casting it:

int rank = Convert.toInt32(Rank.ToString());

an addition to Desp's idea.
0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Problem Hi all,    While many today have fast Internet connection, there are many still who do not, or are connecting through devices with a slower connect, so light web pages and fast load times are still popular.    If your ASP.NET page …
Calculating holidays and working days is a function that is often needed yet it is not one found within the Framework. This article presents one approach to building a working-day calculator for use in .NET.
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…

749 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question