how to convert hex value to decimal using c#

Naidu AMMAN

hi,
here i am write the code for decimal value to hex value.Now my requirement is how to convert hex value to decimal value using windows application code in c#.Please find this code as given below.
thank u

13 Replies

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Manish Kumar Choudhary12y ago
Hi Naidu AMMAN
plz accept the ans incase it helps u.
Thanks
+1
Naidu AMMAN12y ago
thank you very much sir.
0
Manish Kumar Choudhary12y ago
Use it in button click. it will work
string hexValue = textBox1.Text;//.ToString("X");
string[] ids = textBox1.Text.Split(' ');
for (int i = 0; i < ids.Length; i++)
{
int decValue = int.Parse(ids[i], System.Globalization.NumberStyles.HexNumber);
richTextBox1.AppendText(decValue.ToString()+"\n");
}
0
Naidu AMMAN12y ago
sir i tried it is not working sir.
how to convert each of them separately sir.

0
Manish Kumar Choudhary12y ago
It's possible but you have to extract particular string from that textbox. Means to say u have to take every value of string inside textbox when space came and convert each of them separately convert. accept the ans if it help u
0
Naidu AMMAN12y ago
thank u very much sir,

sir we can given "7e" it show the 126.
when i am giving the "7e a0 2b 41" its getting error in

int decValue = int.Parse(hexValue, System.Globalization.NumberStyles.HexNumber);
An unhandled exception of type 'System.FormatException' occurred in mscorlib.dll.

sir it possible to show this data like this "7e a0 2b 41"
0
Manish Kumar Choudhary12y ago
Hi Naidu AMMAN,
find the attachment and check it may help u
0
Naidu AMMAN12y ago
no sir
0
Naidu AMMAN12y ago
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

using System.IO;

namespace Data1
{

public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void button_Load_Click(object sender, EventArgs e)
{
Stream mystream;
OpenFileDialog openfileDailog1 = new OpenFileDialog();

if (openfileDailog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
if ((mystream = openfileDailog1.OpenFile()) != null)
{
string strfilename = openfileDailog1.FileName;

string filetext = File.ReadAllText(strfilename);
//MessageBox.Show(strfilename );
richTextBox1.Text = filetext;
}
}
}

private void button_Search_Click(object sender, EventArgs e)
{

int index = 0;
string temp = richTextBox1.Text;
richTextBox1.Text = "";
richTextBox1.Text = temp;
while (index < richTextBox1.Text.LastIndexOf(textconvert.Text))
{
richTextBox1.Find(textconvert.Text, index, richTextBox1.TextLength, RichTextBoxFinds.None);
richTextBox1.SelectionBackColor = Color.Red;
index = richTextBox1.Text.IndexOf(textconvert.Text, index) + 1;
}
}

private int _myProperty;
public int MyProperty
{
get { return _myProperty; }
set { MyProperty = value; } // Oops, this will cause Stack overflow...should've been '_myProperty = value'
}

// int decValue = int.Parse(hexValue, System.Globalization.NumberStyles.HexNumber);
//or

//int decValue = Convert.ToInt32(hexValue, 16);

private void button2_Click(object sender, EventArgs e)
{
long decnum = 0;
int[] hexnum = new int[20];
int i = 0, r;
// decnum = long.Parse(textconvert.Text);
int decValue = int.Parse(textconvert.Text, System.Globalization.NumberStyles.HexNumber);

while (decnum != 0)
{
r = (int)decnum % 16;
if (r < 10)
{
r = r + 48;
}
else
{
r = r + 55;
}
hexnum[i++] = r;
decnum = decnum / 16;
}
for (int j = i - 1; j >= 0; j--)
{
richTextBox2.Text += (char)hexnum[j];

//string hexValue = decValue.ToString("X");
//int decValue = int.Parse(hexValue, System.Globalization.NumberStyles.HexNumber); or
//int decValue = Convert.ToInt32(hexValue, 16);

}
}

}

}

sir i want out in the button click event only.Because here i am want give the only hex values in textbox(textconvert) and after when i click on button2_Click event this output shows in decimal values in richTextBox2. plz try it sir
0
Manish Kumar Choudhary12y ago
Hi Naidu AMMAN,
it it work for u ?
0
Manish Kumar Choudhary12y ago
```
Use like this 

string hexValue = decValue.ToString("X");
```
int decValue = int.Parse(hexValue, System.Globalization.NumberStyles.HexNumber); or
int decValue = Convert.ToInt32(hexValue, 16);
0
Naidu AMMAN12y ago
sir where u convert this in my code
0
Manish Kumar Choudhary12y ago
Hi Naidu AMMAN,
To convert from Hex to Decimal do either...
```
string hexValue = decValue.ToString("X");
```
int decValue = int.Parse(hexValue, System.Globalization.NumberStyles.HexNumber); or
int decValue = Convert.ToInt32(hexValue, 16);
0