Change text box value to currency format in c#.

Question

1.00/5 (3 votes)

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Display the salary Text Box in decimal by adding $, eg. $4000.00

If i type $40 means display as $40.00
If i type 40 means display as 40 only...

What I have tried:

Change Text box value to currency format in c#.

Posted 21-Feb-17 22:33pm

GrpSMK

Updated 4-Apr-19 10:27am

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4 solutions

Solution 4

// Com esse método o R$ fica fixo e a vírgula se move de acordo com as casas decimais
//
//Crie um textbox com o name txt_valor e adicione os eventos KeyPress, KeyUp, Leave e //uma string valor

string valor;
        private void txt_valor_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (!Char.IsDigit(e.KeyChar) && e.KeyChar != Convert.ToChar(Keys.Back))
            {
                if (e.KeyChar == ',')
                {
                    e.Handled = (txt_valor.Text.Contains(","));
                }
                else
                    e.Handled = true;
            }            
        }

        private void txt_valor_Leave(object sender, EventArgs e)
        {
            valor = txt_valor.Text.Replace("R$", "");
            txt_valor.Text = string.Format("{0:C}", Convert.ToDouble(valor));
        }

        private void txt_valor_KeyUp(object sender, KeyEventArgs e)
        {
        	valor = txt_valor.Text.Replace("R$","").Replace(",","").Replace(" ","").Replace("00,","");
        	if(valor.Length == 0)
        	{
        		txt_valor.Text = "0,00"+valor;
        	}
        	if(valor.Length == 1)
        	{
        		txt_valor.Text = "0,0"+valor;
        	}
        	if(valor.Length == 2)
        	{
        		txt_valor.Text = "0,"+valor;
        	}
        	else if(valor.Length >= 3)
        	{
        		if(txt_valor.Text.StartsWith("0,"))
        		{
        			txt_valor.Text = valor.Insert(valor.Length - 2,",").Replace("0,","");
        		}
        		else if(txt_valor.Text.Contains("00,"))
        		{
        			txt_valor.Text = valor.Insert(valor.Length - 2,",").Replace("00,","");
        		}
        		else
        		{
        			txt_valor.Text = valor.Insert(valor.Length - 2,",");
        		}
        	}        	
        	valor = txt_valor.Text;
            txt_valor.Text = string.Format("{0:C}", Convert.ToDouble(valor));
            txt_valor.Select(txt_valor.Text.Length,0);
        }

C#

Posted 18-Apr-18 3:23am

Member 12841023

Solution 1

Microsoft has great documentation[^] on formatting strings. But here is a quick fix:

C#

int input = 40;
string output = $"{input:C2}";

Posted 21-Feb-17 22:38pm

Graeme_Grant

Comments

GrpSMK 22-Feb-17 4:41am

display in decimal format only by adding $ symbol...?

Graeme_Grant 22-Feb-17 4:43am

did you actually try it???

GrpSMK 22-Feb-17 4:46am

Cant understand your answer,can you explain with an example?

Graeme_Grant 22-Feb-17 4:53am

Click on the link in my answer - there is a ton of information there.

But to answer the question, $"{input:C2}" takes the value and formats it as currency. ie: 40 to "$40.00"

TRY IT.

Solution 2

Hello,

From what i have understood, You want to change the textbox text with decimal if it contains $.

For this you can do like below,

create a textchange event for textbox1

public void textchange(object sender, EventArgs e)
{
   if(textbox1.Text.Contains("$"))
   {
     string valueToConvert = textbox1.Text.replace("$","");
     double newVal = Convert.ToDouble(valueToConvert);

     //Assign the new value with $ to textbox1
     textbox1.Text = "$"+Convert.ToString(newVal);
   }
}

Posted 22-Feb-17 1:25am

ejazwaquif

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Peter Leow · Accepted Answer · 2017-02-22T03:46:00

Say you want to achieve this on a textBox1 on winform, try this:

private void textBox1_Validating(object sender, CancelEventArgs e)
{
    string value;
    NumberStyles style;
    CultureInfo culture;
    decimal currency;

    value = textBox1.Text;
    style = NumberStyles.Number | NumberStyles.AllowCurrencySymbol;
    culture = CultureInfo.CreateSpecificCulture("en-US");
    if (!Decimal.TryParse(value, style, culture, out currency))
    {
        MessageBox.Show("Please enter a valid currency amount.", "Invalid Value", MessageBoxButtons.OK, MessageBoxIcon.Error);
        // prevent the textbox from losing focus
        e.Cancel = true;
    } 
}

private void textBox1_Validated(object sender, EventArgs e)
{
    string input = textBox1.Text.Trim();
    if (input.StartsWith("$"))
    {
        string temp = input.Replace("$","");
        string specifier = "C";
        CultureInfo culture = CultureInfo.CreateSpecificCulture("en-US");
        textBox1.Text = Decimal.Parse(temp).ToString(specifier, culture);
    }
}