准备工作: 1. 首先,打开vs.net,新建一个C#类库项目。如叫 IpBoxControl。 2. 在vs.net 的菜单,“项目”,“添加用户控件”,把这个用户控件取名为IpBox。 3. 把一个Panel从工具箱拖到IpBox的设计视图,取名为panel1,设置panel1的Location为(0,0),Size为(136, 20),BorderStyle为Fixed3D,BackColor为Window。 4. 把一个TextBox从工具箱拖到panel1里。取名为textBox1,设置textBox1的Location为(8,0),Size为(20, 14),BorderStyle为None,MaxLength为3,TextAlign为Center,Text为““,BackColor为Window。 5. 把一个Label从工具箱拖到panel1里。取名为label1,设置label1的Location为(32, 0),Size为(8, 14),BorderStyle为None,TextAlign为TopCenter,Text为“.”,BackColor为Window。 6. 选取textBox1和label1,textBox1复制、粘贴上3份,label1复制、粘贴上2份。分别命名为textBox2、label2,textBox3、label3,textBox4。Location分别为(40, 0)、(64, 0)、(72, 0)、(96, 0)、(104, 0)。 7. 设置IpBox的Location为(0,0),Size为(136, 20)。 现在一个ip box 的形状已经出来了,接下来要在程序里实现输入的控制。 源代码如下:
using System; using System.Collections; using System.ComponentModel; using System.Drawing; using System.Data; using System.Windows.Forms; using System.Text.RegularExpressions;
namespace XRascal.Controls { /// <summary> /// UserControl1 的摘要说明。 /// </summary> [ Description("横刀夺爱的 Ip Box 控件!用于输入 IP 地址。"), ToolboxBitmap(typeof(XRascal.Controls.IpBox)) ] public class IpBox : System.Windows.Forms.UserControl { private System.Windows.Forms.Panel panel1; private System.Windows.Forms.TextBox textBox4; private System.Windows.Forms.Label label3; private System.Windows.Forms.TextBox textBox3; private System.Windows.Forms.Label label2; private System.Windows.Forms.TextBox textBox2; private System.Windows.Forms.Label label1; private System.Windows.Forms.TextBox textBox1; private string _text = ""; /// <summary> /// 必需的设计器变量。 /// </summary> private System.ComponentModel.Container components = null;
public IpBox() { // 该调用是 Windows.Forms 窗体设计器所必需的。 InitializeComponent();
// TODO: 在 InitializeComponent 调用后添加任何初始化 }
/// <summary> /// 清理所有正在使用的资源。 /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if(components != null) { components.Dispose(); } } base.Dispose( disposing ); }
#region 组件设计器生成的代码 /// <summary> /// 设计器支持所需的方法 - 不要使用代码编辑器 /// 修改此方法的内容。 /// </summary> private void InitializeComponent() { this.panel1 = new System.Windows.Forms.Panel(); this.textBox4 = new System.Windows.Forms.TextBox(); this.label3 = new System.Windows.Forms.Label(); this.textBox3 = new System.Windows.Forms.TextBox(); this.label2 = new System.Windows.Forms.Label(); this.textBox2 = new System.Windows.Forms.TextBox(); this.label1 = new System.Windows.Forms.Label(); this.textBox1 = new System.Windows.Forms.TextBox(); this.panel1.SuspendLayout(); this.SuspendLayout(); // // panel1 // this.panel1.BackColor = System.Drawing.Color.White; this.panel1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D; this.panel1.Controls.Add(this.textBox4); this.panel1.Controls.Add(this.label3); this.panel1.Controls.Add(this.textBox3); this.panel1.Controls.Add(this.label2); this.panel1.Controls.Add(this.textBox2); this.panel1.Controls.Add(this.label1); this.panel1.Controls.Add(this.textBox1); this.panel1.Location = new System.Drawing.Point(0, 0); this.panel1.Name = "panel1"; this.panel1.Size = new System.Drawing.Size(136, 20); this.panel1.TabIndex = 1; // // textBox4 // this.textBox4.BorderStyle = System.Windows.Forms.BorderStyle.None; this.textBox4.Location = new System.Drawing.Point(104, 0); this.textBox4.MaxLength = 3; this.textBox4.Name = "textBox4"; this.textBox4.Size = new System.Drawing.Size(20, 14); this.textBox4.TabIndex = 6; this.textBox4.TextAlign = System.Windows.Forms.HorizontalAlignment.Center; this.textBox4.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.textBox4_KeyPress); // // label3 // this.label3.Location = new System.Drawing.Point(96, 0); this.label3.Name = "label3"; this.label3.Size = new System.Drawing.Size(8, 14); this.label3.TabIndex = 5; this.label3.Text = "."; this.label3.TextAlign = System.Drawing.ContentAlignment.TopCenter; // // textBox3 // this.textBox3.BorderStyle = System.Windows.Forms.BorderStyle.None; this.textBox3.Location = new System.Drawing.Point(72, 0); this.textBox3.MaxLength = 3; this.textBox3.Name = "textBox3"; this.textBox3.Size = new System.Drawing.Size(20, 14); this.textBox3.TabIndex = 4; this.textBox3.TextAlign = System.Windows.Forms.HorizontalAlignment.Center; this.textBox3.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.textBox3_KeyPress); // // label2 // this.label2.Location = new System.Drawing.Point(64, 0); this.label2.Name = "label2"; this.label2.Size = new System.Drawing.Size(8, 14); this.label2.TabIndex = 3; this.label2.Text = "."; this.label2.TextAlign = System.Drawing.ContentAlignment.TopCenter; // // textBox2 // this.textBox2.BorderStyle = System.Windows.Forms.BorderStyle.None; this.textBox2.Location = new System.Drawing.Point(40, 0); this.textBox2.MaxLength = 3; this.textBox2.Name = "textBox2"; this.textBox2.Size = new System.Drawing.Size(20, 14); this.textBox2.TabIndex = 2; this.textBox2.TextAlign = System.Windows.Forms.HorizontalAlignment.Center; this.textBox2.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.textBox2_KeyPress); // // label1 // this.label1.Location = new System.Drawing.Point(32, 0); this.label1.Name = "label1"; this.label1.Size = new System.Drawing.Size(8, 14); this.label1.TabIndex = 1; this.label1.Text = "."; this.label1.TextAlign = System.Drawing.ContentAlignment.TopCenter; // // textBox1 // this.textBox1.BorderStyle = System.Windows.Forms.BorderStyle.None; this.textBox1.Location = new System.Drawing.Point(8, 0); this.textBox1.MaxLength = 3; this.textBox1.Name = "textBox1"; this.textBox1.Size = new System.Drawing.Size(20, 14); this.textBox1.TabIndex = 0; this.textBox1.TextAlign = System.Windows.Forms.HorizontalAlignment.Center; this.textBox1.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.textBox1_KeyPress); // // IpBox // this.Controls.Add(this.panel1); this.Name = "IpBox"; this.Size = new System.Drawing.Size(136, 20); this.panel1.ResumeLayout(false); this.ResumeLayout(false);
} #endregion
private void textBox1_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e) { //System.Text.Encoding.GetEncoding(0).GetString(); }
private void textBox1_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e) { MaskIpAddr( textBox1, e ); }
private void textBox2_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e) { MaskIpAddr( textBox2, e ); }
private void textBox3_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e) { MaskIpAddr( textBox3, e ); }
private void textBox4_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e) { MaskIpAddr( textBox4, e ); }
private void MaskIpAddr( System.Windows.Forms.TextBox textBox, KeyPressEventArgs e) { int len = textBox.Text.Length; if(Char.IsDigit(e.KeyChar) || e.KeyChar == '.' || e.KeyChar == 8) { if (e.KeyChar != 8) { if(len == 2 && e.KeyChar != '.') { string tmp = textBox.Text + e.KeyChar; if( textBox.Name == "textBox1" ) { if(Int32.Parse(tmp)> 223) // 进行验证 { MessageBox.Show( tmp + " 不是一个有效项目。请指定一个介于 1 和 223 之间的数值。"); textBox.Text = "223"; textBox.Focus(); return; }
textBox2.Focus(); textBox2.SelectAll(); } else if( textBox.Name == "textBox2" ) { if(Int32.Parse(tmp)> 255) { MessageBox.Show( tmp + " 不是一个有效项目。请指定一个介于 1 和 255 之间的数值。"); textBox.Text = "255"; textBox.Focus(); return; } textBox3.Focus(); textBox3.SelectAll(); } else if( textBox.Name == "textBox3" ) { if(Int32.Parse(tmp)> 255) { MessageBox.Show( tmp + " 不是一个有效项目。请指定一个介于 1 和 255 之间的数值。"); textBox.Text = "255"; textBox.Focus(); return; } textBox4.Focus(); textBox4.SelectAll(); } else if( textBox.Name == "textBox4" ) { if(Int32.Parse(tmp)> 255) { MessageBox.Show( tmp + " 不是一个有效项目。请指定一个介于 1 和 255 之间的数值。"); textBox.Text = "255"; textBox.Focus(); return; } } } if(e.KeyChar == '.') { if( textBox.Name == "textBox1" && textBox.Text != "" ) { textBox2.Focus(); textBox2.SelectAll(); } if( textBox.Name == "textBox2" && textBox.Text != "" ) { textBox3.Focus(); textBox3.SelectAll(); } if( textBox.Name == "textBox3" && textBox.Text != "" ) { textBox4.Focus(); textBox4.SelectAll(); } if( textBox.Name == "textBox4" && textBox.Text != "" ) { } e.Handled = true; } } else { if( textBox.Name == "textBox1" && textBox.Text == "") { } if( textBox.Name == "textBox2" && textBox.Text == "") { textBox1.Focus(); textBox1.SelectionStart = textBox1.Text.Length; } if( textBox.Name == "textBox3" && textBox.Text == "") { textBox2.Focus(); textBox2.SelectionStart = textBox2.Text.Length; } if( textBox.Name == "textBox4" && textBox.Text == "") { textBox3.Focus(); textBox3.SelectionStart = textBox3.Text.Length; } e.Handled = false; } } else e.Handled = true; }
[Browsable(true)] /// <summary> /// 获取 IpBox 的文本。 /// </summary> public new string Text { get { if( textBox1.Text == "" || textBox2.Text == "" || textBox3.Text == "" || textBox4.Text == "") { _text = ""; return _text; } else { _text = Convert.ToInt32(textBox1.Text).ToString() + "." + Convert.ToInt32(textBox2.Text).ToString() + "." + Convert.ToInt32(textBox3.Text).ToString() + "." + Convert.ToInt32(textBox4.Text).ToString(); return _text; } } /* set // { if(value != null) { // 255-255-255-255 //string pattern = @"^([1-9]|\d{2}|1[0-9]{1,2}|2[0-5]{2})\.(\d{1,2}|1[0-9]{1,2}|[1-2][0-5]{2})\.(\d{1,2}|1[0-9]{1,2}|[1-2][0-5]{2})\.(\d{1,2}|1[0-9]{1,2}|[1-2][0-5]{2})$"; // 223-255-255-255 string pattern = @"^([1-9]|\d{2}|1[0-9]{1,2}|2[1-2][1-3])\.(\d{1,2}|1[0-9]{1,2}|[1-2][0-5]{2})\.(\d{1,2}|1[0-9]{1,2}|[1-2][0-5]{2})\.(\d{1,2}|1[0-9]{1,2}|[1-2][0-5]{2})$";
if( !Regex.IsMatch(value , pattern) ) { _text = ""; throw new Exception("IP 地址格式错误!"); } else { string[] ipnum = value.Split('.'); textBox1.Text = ipnum[0]; textBox2.Text = ipnum[1]; textBox3.Text = ipnum[2]; textBox4.Text = ipnum[3]; } }
_text = value;
} */ }
} }
最后,我们要来测试这个控件: 在项目的解决方案里,右击解决方案的属性,新建一个C# 的Windows应用程序项目,取名为TestIpBox。 双击打开 Form1.cs的设计视图,右击工具箱,“添加/移除项”,“浏览”找到刚做好的 dll ,选择,确定。把这个控件从工具箱里拖到Form1的设计视图里。 把 TestIpBox 设成启动项目,按 F5 测试。 
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