如何通过按空格键来增加文本框值 [英] How to increase textbox value by pressing space bar

问题描述

我在Windows窗体中有一个名为tblAmount的文本框。默认显示1.我需要按空格键然后特定文本框（名为tblAmount）将显示值2.如果我再次按空格键则显示3.请帮助我。

我写了以下代码：

I have a textbox in windows form named "tblAmount".By default it shows 1.I need when I press the space bar then a specific textbox's (named tblAmount) will show the value 2. If I press spacebar again it shows 3. Please help me.
I have written the following code :

private void Incrementbutton_KeyDown(object sender, KeyEventArgs e)
        {
if (e.KeyCode == Keys.Space)
            {
                
            }
}

推荐答案

设置textbox3.text默认值为任意整数值

on textbox3 keydown event

set textbox3.text default value to any integer value

if (e.KeyCode == 32) {
    if (string.IsNullOrEmpty(this.TextBox3.Text)) {
        this.TextBox3.Text = 0;
    }
    this.TextBox3.Text = Convert.ToInt32(this.TextBox3.Text) + 1;
}

按照先生的建议在支架内试试。 Prasad Avunoori

try this within the bracket as suggested by Mr. Prasad Avunoori

tblAmount.Text = Convert.ToInt(tblAmount.Text)+1;

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