TextBox_Changed is accumulating the value of the sum c #

Question

TextBox_Changed is accumulating the value of the sum c #

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#1 by (4 votes)
#2 by (1 votes)

3

I am using the textBox_Changed event and when I type a value in the field, another textBox should receive this value, but this other textBox called ValorTotalVenda is accumulating this value.

private void textBox4_TextChanged(object sender, EventArgs e)
{
    if (textBox4.Text != "")
    {
         venda.ValorAcrescimo = Convert.ToDecimal(textBox4.Text);
         venda.ValorTotalVenda += venda.ValorAcrescimo;
         textBox6.Text = Convert.ToString(venda.ValorTotalVenda);
     }
}

c# .net winforms textbox

asked by anonymous 11.01.2017 / 14:36

2 answers

1

Each character typed in textoBox4 is added to the value of the ValorTotalVenda variable, which strikes me as strange. You asked to display the added value in textbox6, since operador + with numbers will perform an addition, not a concatenation.

private void textBox4_TextChanged(object sender, EventArgs e)
    {
        if (textBox4.Text != "")
        {
            venda.ValorAcrescimo = Convert.ToDecimal(textBox4.Text);
            venda.ValorTotalVenda += venda.ValorAcrescimo;
            //Mostra o valor somado
            textBox6.Text = venda.ValorTotalVenda.ToString();
            //ou, mostra inteiramente o conteúdo que está sendo digitado no textbo4
            textBox6.Text = textBox4.Text;
        }
    }

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11.01.2017 / 15:16

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score 4 · Accepted Answer

You are changing the value of the ValueTotalVenda property, would not it be easier just to add the values to the textbox6? the way it is written or you define a global variable for the initial value of the sale or you do it that way.

if (textBox4.Text != "")
        {
            venda.ValorAcrescimo = Convert.ToDecimal(textBox4.Text);
            textBox6.Text = Convert.ToString(venda.ValorTotalVenda + venda.ValorAcrescimo);
        }