C# TextBox事件是我们在开发中会碰到的具体的功能需求,那么如何使得想要的C# TextBox事件执行呢?那么这里就向你介绍具体的C# TextBox事件演示实例,包括需求的实现,希望对你有所帮助。 C# TextBox事件具体的需求: ◆界面要求:定义5个TEXTBOX,分别是:姓名、地址、职业、年龄、输出内容。1个BUTTON ◆满足条件: (1)用户名不能为空 (2)年龄必须是一个大于或等于0的数字 (3)职业必须是“程序员”或为空 (4)地址不能为空 C# TextBox事件实例实现: 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事件实现的具体实例就向你介绍到这里,希望对你了解和学习C# TextBox事件有所帮助。 本文地址:【伊甸网】http://www./tech/devdeloper/Cp/2010-07-16/4753.html |
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