这是一个 C# 输入对话框函数，主要功能包括：
-
基础功能：创建带标题、提示文本和输入框的对话框，返回用户输入或空字符串（取消时）
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增强特性：
- 支持必填项验证
- 支持正则表达式格式验证
- 实时错误提示与按钮状态更新
- 自定义验证失败消息
- 自动资源管理（using 语句）
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用户体验：
- Enter/Esc 快捷键支持
- 输入有效性实时反馈
- 提交时强制格式检查
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代码质量：
- 模块化验证逻辑
- 事件驱动设计
- 安全的资源释放机制
/// <summary>
/// 创建一个可配置的输入对话框，提示用户输入文本并返回结果
/// </summary>
/// <param name="prompt">显示给用户的提示文本</param>
/// <param name="title">对话框的标题（可选，默认为空）</param>
/// <param name="defaultValue">输入框的默认值（可选，默认为空）</param>
/// <param name="isRequired">是否为必填项（可选，默认否）</param>
/// <param name="validationPattern">正则验证模式（可选，默认不验证）</param>
/// <param name="validationMessage">验证失败时的提示（可选）</param>
/// <returns>用户输入的文本，如果用户取消则返回空字符串</returns>
public static string InputBox(string prompt, string title = "", string defaultValue = "",bool isRequired = false,string validationPattern = "",string validationMessage = "输入格式不正确")
{using (Form form = new Form())using (Label label = new Label())using (TextBox textBox = new TextBox())using (Button buttonOk = new Button())using (Button buttonCancel = new Button())using (ErrorProvider errorProvider = new ErrorProvider()){// 配置窗体属性form.Text = title;form.ClientSize = new Size(350, 160);form.FormBorderStyle = FormBorderStyle.FixedDialog;form.StartPosition = FormStartPosition.CenterScreen;form.MinimizeBox = false;form.MaximizeBox = false;form.AcceptButton = buttonOk;form.CancelButton = buttonCancel;form.KeyPreview = true;form.FormClosing += (sender, e) => {if (form.DialogResult == DialogResult.OK && !IsValidInput(textBox.Text)){e.Cancel = true;MessageBox.Show(validationMessage, "输入错误", MessageBoxButtons.OK, MessageBoxIcon.Warning);}};// 配置提示标签label.Text = prompt;label.Location = new Point(15, 20);label.AutoSize = true;// 配置文本输入框textBox.Text = defaultValue;textBox.Location = new Point(15, 85);textBox.Size = new Size(310, 20);textBox.TextChanged += (sender, e) => {errorProvider.Clear();if (isRequired && string.IsNullOrWhiteSpace(textBox.Text)){errorProvider.SetError(textBox, "此字段为必填项");}};// 配置确定按钮buttonOk.Text = "确定";buttonOk.Location = new Point(100, 120);buttonOk.DialogResult = DialogResult.OK;buttonOk.Enabled = !isRequired || !string.IsNullOrWhiteSpace(defaultValue);// 配置取消按钮buttonCancel.Text = "取消";buttonCancel.Location = new Point(180, 120);buttonCancel.DialogResult = DialogResult.Cancel;// 添加控件到窗体form.Controls.AddRange(new Control[] { label, textBox, buttonOk, buttonCancel });// 输入验证方法bool IsValidInput(string input){if (isRequired && string.IsNullOrWhiteSpace(input))return false;if (!string.IsNullOrEmpty(validationPattern) && !System.Text.RegularExpressions.Regex.IsMatch(input, validationPattern))return false;return true;}// 启用实时验证textBox.TextChanged += (sender, e) => {buttonOk.Enabled = IsValidInput(textBox.Text);};// 显示对话框并返回结果return form.ShowDialog() == DialogResult.OK ? textBox.Text : "";}
} 示例调用：
// 简单文本输入
string name = InputBox("请输入姓名");// 带验证的邮箱输入
string email = InputBox("邮箱", "注册", isRequired:true, validationPattern:@"^[\w-]+@[\w-]+\.[a-z]{2,}$");
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