蓝蓝小雪原创：
一个输入数字专用的文本框控件；
支持各类数据格式；
支持用上下箭头、Page Up、Page Down选择；
支持控制大小范围。
使用很简单，我就不说了。直接把下面的代码贴到TextBoxEx.cs中就可以了。
之后用这个控件，在属性面板中可以看到新增的属性，这些属性就可以调整文本框的行为了。
一个输入数字专用的文本框控件；
支持各类数据格式；
支持用上下箭头、Page Up、Page Down选择；
支持控制大小范围。
使用很简单，我就不说了。直接把下面的代码贴到TextBoxEx.cs中就可以了。
之后用这个控件，在属性面板中可以看到新增的属性，这些属性就可以调整文本框的行为了。
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Globalization;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Imaging;
namespace BlueSnowStudio.Common.CommonControls
{
public enum TextBoxExContentType
{
Text,
NumberCurrency,
NumberDecimal,
NumberSingle,
NumberDouble,
NumberSmallInteger,
NumberInteger,
NumberLargeInteger
}
public class TextBoxEx : TextBox
{
private TextBoxExContentType m_ContentType = TextBoxExContentType.Text;
private bool m_EnableMinMax = false;
private double m_MinValue = 0.00;
private double m_MaxValue = 100.00;
public TextBoxEx()
{
InitializeComponent();
}
public TextBoxEx(IContainer container)
{
container.Add(this);
InitializeComponent();
}
[Category("TextBoxEx"), DefaultValue(0)]
public TextBoxExContentType ContentType
{
get
{
return m_ContentType;
}
set
{
m_ContentType = value;
switch (m_ContentType)
{
case TextBoxExContentType.NumberCurrency:
case TextBoxExContentType.NumberDecimal:
case TextBoxExContentType.NumberDouble:
case TextBoxExContentType.NumberInteger:
case TextBoxExContentType.NumberLargeInteger:
case TextBoxExContentType.NumberSingle:
case TextBoxExContentType.NumberSmallInteger:
this.ContextMenu = new ContextMenu();
break;
default:
this.ContextMenu = null;
m_EnableMinMax = false;
break;
}
this.Text = "";
}
}
[Category("TextBoxEx"), DefaultValue(false)]
public bool EnableMinMax
{
get
{
return m_EnableMinMax;
}
set
{
switch (m_ContentType)
{
case TextBoxExContentType.NumberCurrency:
case TextBoxExContentType.NumberDecimal:
case TextBoxExContentType.NumberDouble:
case TextBoxExContentType.NumberInteger:
case TextBoxExContentType.NumberLargeInteger:
case TextBoxExContentType.NumberSingle:
case TextBoxExContentType.NumberSmallInteger:
m_EnableMinMax = value;
break;
default:
m_EnableMinMax = false;
break;
}
this.OnLeave(new EventArgs());
}
}
[Category("TextBoxEx"), DefaultValue(-100.00)]
public double MinValue
{
get
{
return m_MinValue;
}
set
{
m_MinValue = value;
this.OnLeave(new EventArgs());
}
}
[Category("TextBoxEx"), DefaultValue(100.00)]
public double MaxValue
{
get
{
return m_MaxValue;
}
set
{
m_MaxValue = value;
this.OnLeave(new EventArgs());
}
}
public void InitializeComponent()
{
this.KeyPress += new KeyPressEventHandler(TextBoxEx_KeyPress);
this.KeyDown += new KeyEventHandler(TextBoxEx_KeyDown);
this.Leave += new EventHandler(TextBoxEx_Leave);
}
void TextBoxEx_Leave(object sender, EventArgs e)
{
switch (m_ContentType)
{
case TextBoxExContentType.NumberCurrency:
case TextBoxExContentType.NumberDecimal:
case TextBoxExContentType.NumberDouble:
case TextBoxExContentType.NumberInteger:
case TextBoxExContentType.NumberLargeInteger:
case TextBoxExContentType.NumberSingle:
case TextBoxExContentType.NumberSmallInteger:
// handle - and leading zeros input since KeyPress handler must allow this
if (base.Text != "")
{
if (!IsValidNumber(base.Text, false))
base.Text = "";
else if (Double.Parse(base.Text) == 0) // this used for -0, 000 and other strings
base.Text = "0";
}
break;
default:
break;
}
}
void TextBoxEx_KeyDown(object sender, KeyEventArgs e)
{
switch (m_ContentType)
{
case TextBoxExContentType.NumberCurrency:
case TextBoxExContentType.NumberDecimal:
case TextBoxExContentType.NumberDouble:
case TextBoxExContentType.NumberInteger:
case TextBoxExContentType.NumberLargeInteger:
case TextBoxExContentType.NumberSingle:
case TextBoxExContentType.NumberSmallInteger:
Keys keyData = e.KeyData;
if (keyData == (Keys)Shortcut.CtrlV || keyData == (Keys)Shortcut.ShiftIns)
{
IDataObject iData = Clipboard.GetDataObject();
// assemble new string and check IsValid
string newText;
newText = base.Text.Substring(0, base.SelectionStart)
+ (string)iData.GetData(DataFormats.Text)
+ base.Text.Substring(base.SelectionStart + base.SelectionLength);
// check if data to be pasted is convertable to inputType
if (!IsValidNumber(newText, true))
e.Handled = true;
}
else if (keyData == Keys.Up || keyData == Keys.Down)
{
double addvalue;
switch (m_ContentType)
{
case TextBoxExContentType.NumberCurrency:
case TextBoxExContentType.NumberDecimal:
case TextBoxExContentType.NumberSingle:
case TextBoxExContentType.NumberDouble:
addvalue = keyData == Keys.Up ? +0.1 : -0.1;
break;
//case TextBoxExContentType.NumberInteger:
//case TextBoxExContentType.NumberLargeInteger:
//case TextBoxExContentType.NumberSmallInteger:
default:
addvalue = keyData == Keys.Up ? +1 : -1;
break;
}
this.NumberOperate(addvalue);
e.Handled = true;
}
else if (keyData == Keys.PageUp || keyData == Keys.PageDown)
{
double addvalue;
switch (m_ContentType)
{
case TextBoxExContentType.NumberCurrency:
case TextBoxExContentType.NumberDecimal:
case TextBoxExContentType.NumberSingle:
case TextBoxExContentType.NumberDouble:
addvalue = keyData == Keys.PageUp ? +1 : -1;
break;
//case TextBoxExContentType.NumberInteger:
//case TextBoxExContentType.NumberLargeInteger:
//case TextBoxExContentType.NumberSmallInteger:
default:
addvalue = keyData == Keys.PageUp ? +10 : -10;
break;
}
this.NumberOperate(addvalue);
e.Handled = true;
}
else
{
}
break;
default:
break;
}
}
void TextBoxEx_KeyPress(object sender, KeyPressEventArgs e)
{
switch (m_ContentType)
{
case TextBoxExContentType.NumberCurrency:
case TextBoxExContentType.NumberDecimal:
case TextBoxExContentType.NumberDouble:
case TextBoxExContentType.NumberInteger:
case TextBoxExContentType.NumberLargeInteger:
case TextBoxExContentType.NumberSingle:
case TextBoxExContentType.NumberSmallInteger:
char c = e.KeyChar;
if (!Char.IsControl(c)) // not sure about this?? nothing in docs about what is Control char??
{
// prevent spaces
if (c.ToString() == " ")
{
e.Handled = true;
return;
}
string newText = base.Text.Substring(0, base.SelectionStart)
+ c.ToString() + base.Text.Substring(base.SelectionStart + base.SelectionLength);
if (!IsValidNumber(newText, true))
e.Handled = true;
}
break;
default:
break;
}
}
// IsVaildNumber, Copy from Oscar Bowyer's Numerice Edit Control (http://www.codeproject.com/KB/edit/numedit.aspx).
private bool IsValidNumber(string val, bool user)
{
bool ret = true;
if (val.Equals("")
|| val.Equals(String.Empty))
return ret;
if (user)
{
if (val.Equals("-"))
return ret;
}
double Min = m_MinValue;
double Max = m_MaxValue;
try
{
switch (m_ContentType)
{
case TextBoxExContentType.NumberCurrency:
decimal dec = decimal.Parse(val);
int pos = val.IndexOf(".");
if (pos != -1)// 2 decimals + "."
ret = val.Substring(pos).Length <= 3;
//if (m_EnableMinMax) ret &= Min <= (double)dec && (double)dec <= Max;
if (m_EnableMinMax)
{
if ((double)dec <= Min)
{
dec = (decimal)Min;
this.Text = dec.ToString();
this.SelectAll();
ret = false;
}
else if ((double) dec >= Max)
{
dec = (decimal)Max;
this.Text = dec.ToString();
this.SelectAll();
ret = false;
}
}
break;
case TextBoxExContentType.NumberSingle:
float flt = float.Parse(val);
//if (m_EnableMinMax) ret &= Min <= flt && flt <= Max;
if (m_EnableMinMax)
{
if ((double)flt <= Min)
{
flt = (float)Min;
this.Text = flt.ToString();
this.SelectAll();
ret = false;
}
else if ((double)flt >= Max)
{
flt = (float)Max;
this.Text = flt.ToString();
this.SelectAll();
ret = false;
}
}
break;
case TextBoxExContentType.NumberDouble:
double dbl = double.Parse(val);
//if (m_EnableMinMax) ret &= Min <= dbl && dbl <= Max;
if (m_EnableMinMax)
{
if (dbl <= Min)
{
dbl = Min;
this.Text = dbl.ToString();
this.SelectAll();
ret = false;
}
else if (dbl >= Max)
{
dbl = Max;
this.Text = dbl.ToString();
this.SelectAll();
ret = false;
}
}
break;
case TextBoxExContentType.NumberDecimal:
decimal dec2 = decimal.Parse(val);
//if (m_EnableMinMax) ret &= Min <= (double)dec2 && (double)dec2 <= Max;
if (m_EnableMinMax)
{
if ((double)dec2 <= Min)
{
dec2 = (decimal)Min;
this.Text = dec2.ToString();
this.SelectAll();
ret = false;
}
else if ((double)dec2 >= Max)
{
dec2 = (decimal)Max;
this.Text = dec2.ToString();
this.SelectAll();
ret = false;
}
}
break;
case TextBoxExContentType.NumberSmallInteger:
short s = short.Parse(val);
//if (m_EnableMinMax) ret &= Min <= s && s <= Max;
if (m_EnableMinMax)
{
if ((double)s <= Min)
{
s = (short)Min;
this.Text = s.ToString();
this.SelectAll();
ret = false;
}
else if ((double)s >= Max)
{
s = (short)Max;
this.Text = s.ToString();
this.SelectAll();
ret = false;
}
}
break;
case TextBoxExContentType.NumberInteger:
int i = int.Parse(val);
//if (m_EnableMinMax) ret &= Min <= i && i <= Max;
if (m_EnableMinMax)
{
if ((double)i <= Min)
{
i = (int)Min;
this.Text = i.ToString();
this.SelectAll();
ret = false;
}
else if ((double)i >= Max)
{
i = (int)Max;
this.Text = i.ToString();
this.SelectAll();
ret = false;
}
}
break;
case TextBoxExContentType.NumberLargeInteger:
long l = long.Parse(val);
//if (m_EnableMinMax) ret &= Min <= l && l <= Max;
if (m_EnableMinMax)
{
if ((double)l <= Min)
{
l = (long)Min;
this.Text = l.ToString();
this.SelectAll();
ret = false;
}
else if ((double)l >= Max)
{
l = (long)Max;
this.Text = l.ToString();
this.SelectAll();
ret = false;
}
}
break;
default:
throw new ApplicationException();
}
}
catch
{
ret = false;
}
return ret;
}
private void NumberOperate(double addValue)
{
string val = this.Text;
if (val.Equals("") || val.Equals(String.Empty))
{
val = "0";
}
try
{
switch (m_ContentType)
{
case TextBoxExContentType.NumberCurrency:
decimal dec = decimal.Parse(val);
dec += (decimal)addValue;
if (IsValidNumber(dec.ToString(), false)) this.Text = dec.ToString();
break;
case TextBoxExContentType.NumberSingle:
float flt = float.Parse(val);
flt += (float)addValue;
if (IsValidNumber(flt.ToString(), false)) this.Text = flt.ToString();
break;
case TextBoxExContentType.NumberDouble:
double dbl = double.Parse(val);
dbl += (double)addValue;
if (IsValidNumber(dbl.ToString(), false)) this.Text = dbl.ToString();
break;
case TextBoxExContentType.NumberDecimal:
decimal dec2 = decimal.Parse(val);
dec2 += (decimal)addValue;
if (IsValidNumber(dec2.ToString(), false)) this.Text = dec2.ToString();
break;
case TextBoxExContentType.NumberSmallInteger:
short s = short.Parse(val);
s += (short)addValue;
if (IsValidNumber(s.ToString(), false)) this.Text = s.ToString();
break;
case TextBoxExContentType.NumberInteger:
int i = int.Parse(val);
i += (int)addValue;
if (IsValidNumber(i.ToString(), false)) this.Text = i.ToString();
break;
case TextBoxExContentType.NumberLargeInteger:
long l = long.Parse(val);
l += (long)addValue;
if (IsValidNumber(l.ToString(), false)) this.Text = l.ToString();
break;
default:
throw new ApplicationException();
}
}
catch { }
this.SelectAll();
}
}
}
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