CadParamPluging/UI/TextInputForm.cs

using System;
using System.Drawing;
using System.Windows.Forms;

namespace CadParamPluging.UI
{
    public class TextInputForm : Form
    {
        private readonly TextBox _txt;

        public string Value => _txt.Text?.Trim();

        public TextInputForm(string title, string label, string initialValue)
        {
            Text = title;
            Size = new Size(360, 150);
            StartPosition = FormStartPosition.CenterParent;
            FormBorderStyle = FormBorderStyle.FixedDialog;
            MaximizeBox = false;
            MinimizeBox = false;
            ShowInTaskbar = false;

            var layout = new TableLayoutPanel
            {
                Dock = DockStyle.Fill,
                Padding = new Padding(10),
                RowCount = 3,
                ColumnCount = 1
            };
            layout.RowStyles.Add(new RowStyle(SizeType.AutoSize));
            layout.RowStyles.Add(new RowStyle(SizeType.AutoSize));
            layout.RowStyles.Add(new RowStyle(SizeType.AutoSize));

            var lbl = new Label
            {
                Text = label,
                AutoSize = true,
                Dock = DockStyle.Fill
            };

            _txt = new TextBox
            {
                Dock = DockStyle.Fill,
                Text = initialValue ?? string.Empty
            };

            var buttons = new FlowLayoutPanel
            {
                Dock = DockStyle.Fill,
                FlowDirection = FlowDirection.RightToLeft,
                AutoSize = true
            };

            var btnCancel = new Button { Text = "取消", DialogResult = DialogResult.Cancel };
            var btnOk = new Button { Text = "确定", DialogResult = DialogResult.OK };
            buttons.Controls.Add(btnCancel);
            buttons.Controls.Add(btnOk);

            layout.Controls.Add(lbl, 0, 0);
            layout.Controls.Add(_txt, 0, 1);
            layout.Controls.Add(buttons, 0, 2);
            Controls.Add(layout);

            AcceptButton = btnOk;
            CancelButton = btnCancel;
        }

        public static bool TryGetValue(IWin32Window owner, string title, string label, string initialValue, out string value)
        {
            using (var form = new TextInputForm(title, label, initialValue))
            {
                var result = form.ShowDialog(owner);
                if (result == DialogResult.OK)
                {
                    value = form.Value;
                    return true;
                }
            }

            value = null;
            return false;
        }
    }
}