CODEWITHSUNDEEP
c#
Project RedLow
Project RedLow

Reputation: 31

Cannot implicitly convert Ulong to int

I`m writing a program in c# that tracks CPU usage but i cant get an error solved,

"Cannot implicitly convert Ulong to int".

Code below:

        int i;
        i = 0;
        try
        {
            ManagementClass cpuDataClass = new ManagementClass("Win32_PerfFormattedData_PerfOS_Processor");

            while (true)
            {
                ManagementObjectCollection cpuDataClassCollection = cpuDataClass.GetInstances();
                foreach (ManagementObject obj in cpuDataClassCollection)
                {
                    if (obj["Name"].ToString() == "_Total")
                    {
                        i = Convert.ToUInt64(obj["C1TransitionsPersec"]);
                    }
                }
                Thread.Sleep(100);
            }
        }
        catch (ThreadAbortException tbe)
        {

        }


        progressBar1.Maximum = 100;
        progressBar1.Minimum = 1;

        progressBar1.Value = i;
        }

I`m fairly new to C# so i hope this is an easy fix,Anyone that can help me in this?

Upvotes: 0

Views: 9696

Answers (4)

Hemant Chauhan
Hemant Chauhan

Reputation: 51

ONLY if you are sure your ulong variable value will practically stay within the range that int variable can accommodate, then you can do this:

ulong ulongVar = 100;
int intVar = Convert.ToInt32(ulongVar.ToString());

Upvotes: 2

Leônidas Alves Salazar
Leônidas Alves Salazar

Reputation: 1

Basicly you only need convert the property C1TransitionsPersec to a Int32 value. I searched about the managed class Win32_PerfFormattedData_PerfOS_Processor that you are using, to view the properties etc, but class I find nearer was Win32_PerfRawData_PerfOS_Processor, AND it was not in Microsoft docs. The property C1TransitionsPersec is a Int64, so if you do a direct cast, your progress bar goes show a far from real values, I strong recommend you do a proportional convertion, get the max value(or get a value that makes sense) and do the math

Upvotes: 0

Project RedLow
Project RedLow

Reputation: 31

YTAM`s awnser works:

ulong i;
ProgessBar1.value = (int)i;

Upvotes: 0

Soner Gönül
Soner Gönül

Reputation: 98750

Error message is self explanatory..

Your i is int but Convert.ToUInt64 returns ulong and there is no implicit conversation between from ulong to int because int type doesn't have enough range to keep a ulong value.

As a quick solution, change your data type to ulong as;

ulong i;

but you still get a problem on

progressBar1.Value = i;

line since Value property is int type. And even if you cast it as (int)i, you will get different values if your i is bigger than int.MaxValue or less than int.MinValue in checked mode.

Upvotes: 1

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