WinForm IP地址输入框控件实现
本文实例为大家分享了WinFormIP地址输入框控件的具体实现代码，供大家参考，具体内容如下
IPInput.cs
usingSystem;
usingSystem.Collections.Generic;
usingSystem.ComponentModel;
usingSystem.Drawing;
usingSystem.Data;
usingSystem.Text;
usingSystem.Windows.Forms;
usingSystem.Text.RegularExpressions;
namespaceIPInputControl.Ctrl
{
publicpartialclassIPInput:UserControl
{
publicIPInput()
{
InitializeComponent();
}
TextBoxParentTxt;
privatevoidIPInput_Load(objectsender,EventArgse)
{
ParentTxt=txt_1;
}
publicvoidtxt_KeyDown(objectsender,KeyEventArgse)
{
ParentTxt=(TextBox)sender;
if(e.KeyCode==Keys.Left)
{
switch(ParentTxt.Name.Split('_')[1])
{
case"1":
break;
case"2":
if(ParentTxt.SelectionStart==0&&ParentTxt.Text!="")
{
if(int.Parse(ParentTxt.Text)>255)
{
MessageBox.Show(ParentTxt.Text+"不是有效项。请指定一个介于1和255之间的值。","错误",MessageBoxButtons.OK,MessageBoxIcon.Warning);
ParentTxt.Text="255";
ParentTxt.SelectionStart=0;
}
else
{
txt_1.Focus();
}
}
elseif(ParentTxt.Text=="")
{
txt_1.Focus();
}
break;
case"3":
if(ParentTxt.SelectionStart==0&&ParentTxt.Text!="")
{
if(int.Parse(ParentTxt.Text)>255)
{
MessageBox.Show(ParentTxt.Text+"不是有效项。请指定一个介于1和255之间的值。","错误",MessageBoxButtons.OK,MessageBoxIcon.Warning);
ParentTxt.Text="255";
ParentTxt.SelectionStart=0;
}
else
{
txt_2.Focus();
}
}
elseif(ParentTxt.Text=="")
{
txt_2.Focus();
}
break;
case"4":
if(ParentTxt.SelectionStart==0&&ParentTxt.Text!="")
{
if(int.Parse(ParentTxt.Text)>255)
{
MessageBox.Show(ParentTxt.Text+"不是有效项。请指定一个介于1和255之间的值。","错误",MessageBoxButtons.OK,MessageBoxIcon.Warning);
ParentTxt.Text="255";
ParentTxt.SelectionStart=0;
}
else
{
txt_3.Focus();
}
}
elseif(ParentTxt.Text=="")
{
txt_3.Focus();
}
break;
}
}
elseif(e.KeyCode==Keys.Right)
{
switch(ParentTxt.Name.Split('_')[1])
{
case"1":
if(ParentTxt.SelectionStart==ParentTxt.Text.Length&&ParentTxt.Text!="")
{
if(int.Parse(ParentTxt.Text)>223)
{
MessageBox.Show(ParentTxt.Text+"不是有效项。请指定一个介于1和223之间的值。","错误",MessageBoxButtons.OK,MessageBoxIcon.Warning);
ParentTxt.Text="223";
ParentTxt.SelectionStart=ParentTxt.Text.Length;
}
else
{
txt_2.Focus();
}
}
elseif(ParentTxt.Text=="")
{
txt_2.Focus();
}
break;
case"2":
if(ParentTxt.SelectionStart==ParentTxt.Text.Length&&ParentTxt.Text!="")
{
if(int.Parse(ParentTxt.Text)>255)
{
MessageBox.Show(ParentTxt.Text+"不是有效项。请指定一个介于1和255之间的值。","错误",MessageBoxButtons.OK,MessageBoxIcon.Warning);
ParentTxt.Text="255";
ParentTxt.SelectionStart=ParentTxt.Text.Length;
}
else
{
txt_3.Focus();
}
}
elseif(ParentTxt.Text=="")
{
txt_3.Focus();
}
break;
case"3":
if(ParentTxt.SelectionStart==ParentTxt.Text.Length&&ParentTxt.Text!="")
{
if(int.Parse(ParentTxt.Text)>255)
{
MessageBox.Show(ParentTxt.Text+"不是有效项。请指定一个介于1和255之间的值。","错误",MessageBoxButtons.OK,MessageBoxIcon.Warning);
ParentTxt.Text="255";
ParentTxt.SelectionStart=ParentTxt.Text.Length;
}
else
{
txt_4.Focus();
}
}
elseif(ParentTxt.Text=="")
{
txt_4.Focus();
}
break;
case"4":
break;
}
}
}
publicvoidtxt_KeyPress(objectsender,KeyPressEventArgse)
{
ParentTxt=(TextBox)sender;
Regexregex=newRegex(@"^[0-9]+$");
if(!regex.IsMatch(e.KeyChar.ToString())&&e.KeyChar!=(Char)Keys.Back)
{
e.Handled=true;
}
elseif(e.KeyChar==(Char)Keys.Back)
{
e.Handled=false;
switch(ParentTxt.Name.Split('_')[1])
{
case"1":
break;
case"2":
if(ParentTxt.SelectionStart==0)
{
txt_1.Focus();
if(txt_1.Text!="")
{
txt_1.Text=txt_1.Text.Substring(0,txt_1.Text.Length-1);
}
txt_1.SelectionStart=txt_1.Text.Length;
}
break;
case"3":
if(ParentTxt.SelectionStart==0)
{
txt_2.Focus();
if(txt_2.Text!="")
{
txt_2.Text=txt_2.Text.Substring(0,txt_2.Text.Length-1);
}
txt_2.SelectionStart=txt_2.Text.Length;
}
break;
case"4":
if(ParentTxt.SelectionStart==0)
{
txt_3.Focus();
if(txt_3.Text!="")
{
txt_3.Text=txt_3.Text.Substring(0,txt_3.Text.Length-1);
}
txt_3.SelectionStart=txt_3.Text.Length;
}
break;
}
}
else
{
switch(ParentTxt.Name.Split('_')[1])
{
case"1":
if(ParentTxt.SelectionStart==ParentTxt.Text.Length)
{
if(int.Parse(ParentTxt.Text+e.KeyChar.ToString())>223)
{
MessageBox.Show(ParentTxt.Text+e.KeyChar.ToString()+"不是有效项。请指定一个介于1和223之间的值。","错误",MessageBoxButtons.OK,MessageBoxIcon.Warning);
e.Handled=true;
ParentTxt.Text="223";
}
else
{
e.Handled=false;
}
}
elseif(ParentTxt.Text.Length!=3)
{
e.Handled=false;
}
else
{
e.Handled=true;
}
break;
default:
if(ParentTxt.SelectionStart==ParentTxt.Text.Length)
{
if(int.Parse(ParentTxt.Text+e.KeyChar.ToString())>255)
{
MessageBox.Show(ParentTxt.Text+e.KeyChar.ToString()+"不是有效项。请指定一个介于1和255之间的值。","错误",MessageBoxButtons.OK,MessageBoxIcon.Warning);
e.Handled=true;
ParentTxt.Text="255";
}
else
{
e.Handled=false;
}
}
elseif(ParentTxt.Text.Length!=3)
{
e.Handled=false;
}
else
{
e.Handled=true;
}
break;
}
}
}
publicvoidtxt_TextChanged(objectsender,EventArgse)
{
if(ParentTxt.Text.Length==3)
{
switch(ParentTxt.Name.Split('_')[1])
{
case"1":
if(ParentTxt.SelectionStart==ParentTxt.Text.Length)
{
txt_2.Focus();
}
break;
case"2":
if(ParentTxt.SelectionStart==ParentTxt.Text.Length)
{
txt_3.Focus();
}
break;
case"3":
if(ParentTxt.SelectionStart==ParentTxt.Text.Length)
{
txt_4.Focus();
}
break;
case"4":
break;
}
}
}
}
}
ControlText.cs
usingSystem;
usingSystem.Collections.Generic;
usingSystem.ComponentModel;
usingSystem.Drawing;
usingSystem.Data;
usingSystem.Text;
usingSystem.Windows.Forms;
usingSystem.Text.RegularExpressions;
namespaceIPInputControl.Ctrl
{
publicpartialclassControlText:TextBox
{
publicControlText()
{
InitializeComponent();
}
publicvoidtxt_TextChange(objectsender,EventArgse)
{
if(this.Text.Length==3)
{
SendKeys.Send("{TAB}");
}
}
protectedoverrideboolProcessCmdKey(refMessagemsg,KeyskeyData)
{
if(keyData==Keys.Tab)
{
returntrue;
}
returnbase.ProcessCmdKey(refmsg,keyData);
}
}
}
更多完整代码请点击下载：WinFormIP地址输入框控件
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。