winfrom默认是不支持这种操作的,此时需要重写控件操作,具体代码如下: public class TextBoxEx : TextBox { public String PlaceHolderStr { get; set; } protected override void OnPaint(PaintEventArgs e) { // if (!String.IsNullOrEmpty(this.PlaceHolderStr)) { //坐标位置 0,0 需要根据对齐方式重新计算. e.Gr…
html5文本框提示文字属性为placeholder 例子:  <textarea id="comment" class="commentCont"  name="" cols="" placeholder="请踊跃发言,长度至少要6个中英文字哦,请不要恶意灌水哦" rows=""></textarea> ie鼠标点击文本框提示文字消息 火狐输入文字时候消失…
比如WInform中的文本框只能输入数字活着字母和退格键,e.kaychar(按下键盘的值)…
这是一个自定义控件,继承了TextBox,在TextBox基础上添加了4个属性(下载): 1.ControlType 文本框需要验证的类型 2.ControlTypeText 显示的文字(只读) 3.IsNULL 填写的内容是否可空 4.IsPass 格式是否正确(在文本框失去焦点时验证,只读) 代码如下: using System; using System.Collections.Generic; using System.Linq; using System.Text; using Sys…
文本框数字,数值校验 public void DigitCheck_KeyPress(object sender, KeyPressEventArgs e) { e.Handled = !char.IsDigit(e.KeyChar) && !char.IsControl(e.KeyChar); } public void DecimalCheck_KeyPress(object sender, KeyPressEventArgs e) { if (!char.IsControl(e.Ke…
直接看代码 <!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <title>jQuery UI Autocomplete - Default functionality</title> <link rel="stylesheet" href="bootstrap.css"/&…
private string Notes = "提示文本"; private void textBox1_Leave(object sender, EventArgs e) { // 退出失去焦点,重新显示 if (string.IsNullOrEmpty(textBox1.Text)) { textBox1.ForeColor = Color.DarkGray; this.textBox1.Text = Notes; } } private void textBox1_Enter(o…
delegate void SetTextCallback(string text); private void showClientMsg(string text) { // InvokeRequired required compares the thread ID of the // calling thread to the thread ID of the creating thread. // If these threads are different, it returns tr…
private void textBox3_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e) { //阻止从键盘输入键 e.Handled = true; ') { e.Handled = false; } } 或者 private void tbID_KeyPress(object sender, KeyPressEventArgs e) { ') || e.KeyChar == ' '))//不输入输入除了数字…
有3个常用方法 1.MouseMove事件中,使选不中 private void textBox3_MouseMove(object sender, MouseEventArgs e) { if (this.textBox3.SelectionLength > 0) { this.textBox3.SelectionStart = this.textBox1.TextLength; this.textBox3.SelectionLength = 0; } } 2. 新建一个类,取名为TextBo…