kev/Drawer/UCDraw/SigmaDrawerStyle/PropertyEditorGriddingKevSource.cs

using System;
using System.ComponentModel;
using System.Drawing.Design;
using System.Windows.Forms;

namespace GeoSigma.SigmaDrawerStyle
{

    /// <summary>
    /// kev 数据来源选择框
    /// </summary>
    public class PropertyEditorGriddingKevSource : UITypeEditor
    {
        private OpenFileDialog fileDialog = new OpenFileDialog();

        /// <inheritdoc/>
        public override UITypeEditorEditStyle GetEditStyle(ITypeDescriptorContext context)
        {
            return UITypeEditorEditStyle.DropDown;
        }

        /// <inheritdoc/>
        public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
        {
            fileDialog.FileName = value?.ToString();
            fileDialog.Filter = "*.kev|*.kev|*.dfd|*.dfd";
            if (fileDialog.ShowDialog() == DialogResult.OK)
            {
                return fileDialog.FileName;
            }

            return base.EditValue(context, provider, value);
        }
    }
}