visual-studio 数字文本框作为 Visual Studio 工具箱中的控件
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numeric-only textbox as a control in Visual Studio toolbox
提问by pvaju896
I would like to make one numeric-only textbox. I'd like to then add that same to the control toolbox within Visual Studio 2008
我想做一个只有数字的文本框。然后我想将相同的内容添加到 Visual Studio 2008 中的控件工具箱中
I've already built the function to allow only numeric.
我已经构建了只允许数字的函数。
How can I make it available in the toolbox?
如何使其在工具箱中可用？
回答by Serkan Hekimoglu
This is how you can create numeric TextBox:
这是创建数字的方法TextBox：
public class NumericTextBox : TextBox
{
protected override void OnKeyPress(KeyPressEventArgs e)
{
if (!char.IsControl(e.KeyChar) && !char.IsDigit(e.KeyChar))
{
e.Handled = true;
}
base.OnKeyPress(e);
}
}
回答by Randhi Rupesh
Call this method on key press
在按键时调用此方法
function NumberOnly(evt)
{
var charCode = (evt.which) ? evt.which : event.keyCode
if (charCode > 31 && (charCode < 48 || charCode > 57))
return false;
return true;
}
回答by Chandan Kumar
Hi you can do something like this in the textchanged event of the textbox.
嗨，您可以在文本框的 textchanged 事件中执行类似的操作。
here is a demo
这是一个演示
private void textBox1_TextChanged(object sender, EventArgs e)
{
string actualdata = string.Empty;
char[] entereddata = textBox1.Text.ToCharArray();
foreach (char aChar in entereddata.AsEnumerable())
{
if (Char.IsDigit(aChar))
{
actualdata = actualdata + aChar;
// MessageBox.Show(aChar.ToString());
}
else
{
MessageBox.Show(aChar + " is not numeric");
actualdata.Replace(aChar, ' ');
actualdata.Trim();
}
}
textBox1.Text = actualdata;
}
回答by Bill
Don't reinvent the wheel. Download this:
http://www.asp.net/ajax/ajaxcontroltoolkit/Samples/NumericUpDown/NumericUpDown.aspx
不要重新发明轮子。下载这个：http:
//www.asp.net/ajax/ajaxcontroltoolkit/Samples/NumericUpDown/NumericUpDown.aspx
EDIT:
编辑：
Okay. I am getting downvoted for some three-year old advice. Currently, I would recommend looking into the contents of jQuery UI.
好的。我对一些三年前的建议投了反对票。目前，我建议查看 jQuery UI 的内容。
