Revit 2011二次开发“弹出对话框，得到输入的值”

新建一个窗体FrmDlg.cs

编辑框txtVal
按钮btnOk

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace RevitCodes
{
    public partial class FrmDlg : Form
    {
        public string Val
        {
            get { return txtVal.Text; }
            set { txtVal.Text = value; }
        }
        public FrmDlg()
        {
            InitializeComponent();
        }

        private void btnOk_Click(object sender, EventArgs e)
        {
            this.DialogResult = DialogResult.OK;
        }
    }
}

调用

#region 弹出对话框，得到输入的值
[Transaction(TransactionMode.Manual)]
[Regeneration(RegenerationOption.Manual)]
public class GetDialogValue : IExternalCommand
{
    public Result Execute(ExternalCommandData commandData, ref string messages, ElementSet elements)
    {
        FrmDlg frmDlg = new FrmDlg();
        frmDlg.ShowDialog();
        if (frmDlg.DialogResult == DialogResult.OK)
        {
            MessageBox.Show("得到的值为：\n" + frmDlg.Val);
        }
        frmDlg.Dispose();
        return Result.Succeeded;
    }
}
#endregion