NumericUpDown()

Question

I have a windows form and i have declared an object of NumericUpDown()

 this._nudHeight = new System.Windows.Forms.NumericUpDown();

can you explain me the meaning of code given below, according to it 10,000 is the max. val and 0 is the min val,  but what other two zeros represent?

 this._nudHeight.Maximum = new decimal(new int[] {
            10000,
            0,
            0,
            0});

Answer 1

Well, all the 3 zeros are part of the 10,000.

The Int array is actually represent a bits array.

if you will put a huge number like 429495642333333 you will get in the

InitializeComponent method:

this.numericUpDown1.Maximum = new decimal(new int[] {
            -1087266667,
            99999,
            0,
            0});

I am not an expert in the all the bit to Dec, hex, etc... converting stuff, but you will find more info in the next link:

http://msdn.microsoft.com/en-us/library/system.decimal.getbits.aspx

Answer 2

Additional you might read up the C# Reference entry regarding the decimal constructor you are using:

http://msdn.microsoft.com/en-us/library/t1de0ya1.aspx

wizend

Answer 3

Well, that is one really wierd and complicated way to set a decimal ;)

I would just write:

this._nudHeight.Maximum = 10000m;

and for 429495642333333 I would jsut write:

this._nudHeight.Maximum = 429495642333333m;

the suffix 'm' tells the compiler "this is not a double or int, this is a decimal". I guess if you really want to deal with how decimal works internally, you can use the Constructor that expects a one dimensional, 4 Element Int Array. Or the 3 Int32, Boolean & Byte Version. But most people use just a string literal with m as suffix:

http://msdn.microsoft.com/en-us/library/364x0z75.aspx

The core thing is, that internally it Decimal uses a 96-bit integer. You can't use 96-bit integers (or could not when this class was written), but if you know how do it you can split one 96-bit Number over 3 32-bit Numbers.

Elements 1-3 of the Array[] Verion do the same as the 3 Int32 in the complicated version.
Element 4 (index 3) of the array encodes what is done with the Boolean and Byte in the Complicated one.

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