如何在文本框中更改值

问题描述：

这是我的代码

Here is my code

public void sum1()
        {
            try
            {
                string CD;

                int sum = 0;
                for (int i = 0; i < dataGridView1.Rows.Count; i++)
                {

                    CD = dataGridView1[1, i].Value.ToString();

                    if (CD == "C")
                    {
                        sum += Convert.ToInt32(dataGridView1.Rows[i].Cells[2].Value);
                    }
                    else if (CD == "D")
                    {
                        sum -= Convert.ToInt32(dataGridView1.Rows[i].Cells[2].Value);
                    }
                }
                txttotalsum.Text = sum.ToString();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }

如果sum = -25300，我想在25300.000cr
这样的文本框中显示如果总和= 25300，我想在像25300.00dr
这样的文本框中显示
请帮助我，谢谢高级
Rosy

Want to like that if if sum=-25300 than i want to show in text box like 25300.000cr
And if sum =25300 than i want to show in text box like 25300.00dr

Please help me thanks in advanced
Rosy

答

您必须决定如何对待sum == 0. "0cr"或"0dr".

You have to decide how to treat sum == 0. "0cr" or "0dr".

txttotalsum.Text = (sum < 0)? sum.ToString()+"cr" : sum.ToString()+"dr";

代表"0dr"

for "0dr"

txttotalsum.Text = (sum <= 0)? sum.ToString()+"cr" : sum.ToString()+"dr";

代表"0cr"

问候
Michel

for "0cr"

regards
Michel

也许是一个小的变化，例如:

Perhaps a small change like:

txttotalsum.Text = sum >= 0 ? sum.ToString() + "cr" : Math.Abs(sum).ToString() + "dr";

public void sum1()
{
    try
    {
        int sum = 0;

        foreach(Row r in dataGridView1.Rows)
        {

            string text = r.Cells[1].Text;
            string value = r.Cells[2].Text;

            if (text.Contains("C"))
            {
                sum += Convert.ToInt32(value);
            }
            else if (text.contains("D"))
            {
                sum -= Convert.ToInt32(value);
            }
        }

        string suffix = string.empty;

        if(sum>0){suffix = "cr"}
        else if(sum<0){suffix = "dr"}

        txttotalsum.Text = sum.ToString() + suffix;
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
    }

我建议您使用foreach循环，比for循环更安全.
关于零-非零后缀，您可以决定是否使用if-cascade

在这种情况下，cr为正，dr为负，零为零.

这取决于您的喜好

i suggest u using the foreach loop, is safier than the for loop.
about the zero-nonzero suffix you can decide it whith an if-cascade

in that case there are cr for positive, dr for negative and nothing for zero.

it depends on what you prefer

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