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C# TextBox事件是我們?cè)陂_發(fā)中會(huì)碰到的具體的功能需求,那么如何使得想要的C# TextBox事件執(zhí)行呢?那么這里就向你介紹具體的C# TextBox事件演示實(shí)例,包括需求的實(shí)現(xiàn),希望對(duì)你有所幫助。 C# TextBox事件具體的需求: ◆界面要求:定義5個(gè)TEXTBOX,分別是:姓名、地址、職業(yè)、年齡、輸出內(nèi)容。1個(gè)BUTTON ◆滿足條件: (1)用戶名不能為空 (2)年齡必須是一個(gè)大于或等于0的數(shù)字 (3)職業(yè)必須是“程序員”或?yàn)榭?/p> (4)地址不能為空 C# TextBox事件實(shí)例實(shí)現(xiàn): using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; namespace Chapter14 ... { public partial class Form1 : Form ... { public Form1() ... { InitializeComponent(); this.button1.Enabled = false; this.textBox1.Tag = false; this.textBox2.Tag = false; this.textBox3.Tag = false; this.textBox4.Tag = false; this.textBox1.Validating+= new System.ComponentModel.CancelEventHandler( this.textboxEmpty_Validating); this.textBox2.Validating += new System.ComponentModel.CancelEventHandler( this.textboxEmpty_Validating); this.textBox3.Validating+= new System.ComponentModel.CancelEventHandler( this.textboxOccupation_Validating); this.textBox4.Validating += new System.ComponentModel.CancelEventHandler( this.textboxEmpty_Validating); this.textBox1.TextChanged += new System.EventHandler(this.textbox_TextChanged); this.textBox4.TextChanged += new System.EventHandler(this.textbox_TextChanged); this.textBox3.TextChanged += new System.EventHandler(this.textbox_TextChanged); } //C# TextBox事件 private void textboxOccupation_Validating( object sender, System.ComponentModel.CancelEventArgs e) ... { TextBox tb=(TextBox)sender; if (tb.Text.CompareTo("Programmer") == 0||tb.Text.Length==0) ... { tb.Tag = true; tb.BackColor = System.Drawing.SystemColors.Window; } else ... { tb.Tag = false; tb.BackColor = Color.Red; } ValidateOk(); } //C# TextBox事件 private void textboxEmpty_Validating( object sender, System.ComponentModel.CancelEventArgs e) ... { TextBox tb = (TextBox)sender; if (tb.Text.Length == 0) ... { tb.BackColor = Color.Red; tb.Tag = false; } else ... { tb.BackColor = System.Drawing.SystemColors.Window; tb.Tag = true; } ValidateOk(); } private void textboxAge_KeyPress( object sender, KeyPressEventArgs e) ... { if ((e.KeyChar < 48 || e.KeyChar > 57) && e.KeyChar != 8) e.Handled = true; } private void textbox_TextChanged( object sender, System.EventArgs e) ... { TextBox tb = (TextBox)sender; if (tb.Text.Length == 0&& tb!=textBox3) ... { tb.Tag = false; tb.BackColor = Color.Red; } else if (tb == this.textBox3 && (tb.Text.Length != 0 && tb.Text.CompareTo("Programmer") != 0)) ... { tb.Tag = false; } //C# TextBox事件 else ... { tb.Tag = true; tb.BackColor = SystemColors.Window; } ValidateOk(); } private void ValidateOk() ... { this.button1.Enabled = ((bool)(this.textBox2.Tag) && (bool)(this.textBox4.Tag) && (bool)(this.textBox1.Tag) && (bool)(this.textBox3.Tag)); } private void button1_Click( object sender, EventArgs e) ... { string output; //C# TextBox事件 output = "Name:" + this.textBox1.Text + " "; output += "Address:" + this.textBox2.Text + " "; output += "Occupation:" + this.textBox3.Text + " "; output += "Age:" + this.textBox4.Text + " "; this.textBox5.Text = output; } } } C# TextBox事件實(shí)現(xiàn)的具體實(shí)例就向你介紹到這里,希望對(duì)你了解和學(xué)習(xí)C# TextBox事件有所幫助。 本文地址:【伊甸網(wǎng)】http://www./tech/devdeloper/Cp/2010-07-16/4753.html |
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