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Csharp/C Sharp by API/System.Windows.Forms/KeyPressEventArgs - История изменений
2026-04-30T13:44:44Z
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в 15:31, 26 мая 2010
2010-05-26T15:31:35Z
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Admin: 1 версия
2010-05-26T12:09:10Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>==KeyPressEventArgs.Handled==<br />
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<source lang="csharp"> <br />
using System;<br />
using System.Drawing;<br />
using System.Collections;<br />
using System.ruponentModel;<br />
using System.Windows.Forms;<br />
using System.Data;<br />
public class TextCancelEventKeyEvent : System.Windows.Forms.Form<br />
{<br />
private System.Windows.Forms.Label label1;<br />
private System.Windows.Forms.TextBox txtInput;<br />
private System.Windows.Forms.Label label2;<br />
private System.Windows.Forms.Label lblTrue;<br />
private System.Windows.Forms.Label label3;<br />
private System.Windows.Forms.Label lblCheck;<br />
private System.Windows.Forms.Label lblResults;<br />
public TextCancelEventKeyEvent()<br />
{<br />
InitializeComponent();<br />
}<br />
private void InitializeComponent()<br />
{<br />
this.label1 = new System.Windows.Forms.Label();<br />
this.txtInput = new System.Windows.Forms.TextBox();<br />
this.label2 = new System.Windows.Forms.Label();<br />
this.lblTrue = new System.Windows.Forms.Label();<br />
this.label3 = new System.Windows.Forms.Label();<br />
this.lblCheck = new System.Windows.Forms.Label();<br />
this.lblResults = new System.Windows.Forms.Label();<br />
this.SuspendLayout();<br />
// <br />
// label1<br />
// <br />
this.label1.Font = new System.Drawing.Font("Tahoma", 14.25F, (System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic), System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));<br />
this.label1.Location = new System.Drawing.Point(48, 16);<br />
this.label1.Name = "label1";<br />
this.label1.Size = new System.Drawing.Size(176, 23);<br />
this.label1.TabIndex = 0;<br />
this.label1.Text = "ISBN Validation";<br />
// <br />
// txtInput<br />
// <br />
this.txtInput.Location = new System.Drawing.Point(72, 64);<br />
this.txtInput.Name = "txtInput";<br />
this.txtInput.TabIndex = 1;<br />
this.txtInput.Text = "";<br />
this.txtInput.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.txtInput_KeyPress);<br />
this.txtInput.Validating += new System.ruponentModel.CancelEventHandler(this.handleCancleEvent);<br />
// <br />
// label2<br />
// <br />
this.label2.Location = new System.Drawing.Point(24, 104);<br />
this.label2.Name = "label2";<br />
this.label2.Size = new System.Drawing.Size(80, 23);<br />
this.label2.TabIndex = 2;<br />
this.label2.Text = "True Number:";<br />
// <br />
// lblTrue<br />
// <br />
this.lblTrue.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;<br />
this.lblTrue.Location = new System.Drawing.Point(112, 104);<br />
this.lblTrue.Name = "lblTrue";<br />
this.lblTrue.TabIndex = 3;<br />
// <br />
// label3<br />
// <br />
this.label3.Location = new System.Drawing.Point(32, 152);<br />
this.label3.Name = "label3";<br />
this.label3.Size = new System.Drawing.Size(72, 23);<br />
this.label3.TabIndex = 4;<br />
this.label3.Text = "Check Digit:";<br />
// <br />
// lblCheck<br />
// <br />
this.lblCheck.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;<br />
this.lblCheck.Location = new System.Drawing.Point(112, 152);<br />
this.lblCheck.Name = "lblCheck";<br />
this.lblCheck.TabIndex = 5;<br />
// <br />
// lblResults<br />
// <br />
this.lblResults.Location = new System.Drawing.Point(56, 192);<br />
this.lblResults.Name = "lblResults";<br />
this.lblResults.Size = new System.Drawing.Size(152, 24);<br />
this.lblResults.TabIndex = 8;<br />
// <br />
// TextCancelEventKeyEvent<br />
// <br />
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);<br />
this.ClientSize = new System.Drawing.Size(264, 293);<br />
this.Controls.AddRange(new System.Windows.Forms.Control[] {<br />
this.lblResults,<br />
this.lblCheck,<br />
this.label3,<br />
this.lblTrue,<br />
this.label2,<br />
this.txtInput,<br />
this.label1});<br />
this.ResumeLayout(false);<br />
}<br />
[STAThread]<br />
static void Main() <br />
{<br />
Application.Run(new TextCancelEventKeyEvent());<br />
}<br />
private void handleCancleEvent(object sender, System.ruponentModel.CancelEventArgs e)<br />
{<br />
TextBox tb = (TextBox)sender;<br />
string strInput = tb.Text;<br />
Console.WriteLine(strInput);<br />
} <br />
private void txtInput_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)<br />
{<br />
char keyChar;<br />
keyChar = e.KeyChar;<br />
if(!Char.IsDigit(keyChar) // 0 - 9<br />
&&<br />
keyChar != 8 // backspace<br />
&&<br />
keyChar != 13 // enter<br />
&&<br />
keyChar != "x"<br />
&&<br />
keyChar != 45 // dash/minus<br />
){<br />
// Do not display the keystroke<br />
e.Handled = true;<br />
}<br />
} <br />
}<br />
<br />
<br />
</source></div>
Admin