本篇文章為大家展示了C# 中怎么實(shí)現(xiàn)一個(gè)TextBox事件,內(nèi)容簡(jiǎn)明扼要并且容易理解,絕對(duì)能使你眼前一亮,通過(guò)這篇文章的詳細(xì)介紹希望你能有所收獲。

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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; } } }上述內(nèi)容就是C# 中怎么實(shí)現(xiàn)一個(gè)TextBox事件,你們學(xué)到知識(shí)或技能了嗎?如果還想學(xué)到更多技能或者豐富自己的知識(shí)儲(chǔ)備,歡迎關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道。
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