NDBGJK5.0/Kingo.Plugins/Kingo.Plugin.MapView/Views/UcClaculationMJView.xaml.cs

using ESRI.ArcGIS.Carto;
using ESRI.ArcGIS.Geodatabase;
using KGIS.Framework.AE.ExtensionMethod;
using KGIS.Framework.Platform.Helper;
using KGIS.Framework.Utils;
using KGIS.Framework.Utils.ExtensionMethod;
using KGIS.Framework.Utils.Helper;
using System;
using System.Runtime.InteropServices;
using System.Windows;
using KUI.Windows;

namespace Kingo.Plugin.MapView.Views
{
    /// <summary>
    /// UcClaculationMJView.xaml 的交互逻辑
    /// </summary>
    public partial class UcClaculationMJView : BaseWindow
    {
        IFeatureLayer _TarLayer = null;
        public UcClaculationMJView(object pLayer)
        {
            InitializeComponent();
            if (pLayer is IFeatureLayer)
            {
                _TarLayer = pLayer as IFeatureLayer;

                IFields fields = _TarLayer.FeatureClass.Fields;
                for (int i = 0; i < fields.FieldCount; i++)
                {
                    IField field = fields.Field[i];
                    if (!field.Name.EndsWith("MJ"))
                        continue;
                    if (field.Type != esriFieldType.esriFieldTypeDouble)
                        continue;
                    combField.Items.Add(string.Format("{0}({1})", field.AliasName, field.Name));
                }
            }
        }

        private void BtnOK_Click(object sender, RoutedEventArgs e)
        {
            IFeatureCursor cursor = null;
            IFeature f = null;
            try
            {
                if (combField.SelectedItem == null) return;
                this.ShowLoading("正在进行椭球面积计算......", 0, 0);
                string FieldInfo = combField.SelectedItem.ToTrim();
                FieldInfo = FieldInfo.Substring(FieldInfo.IndexOf("(") + 1, FieldInfo.IndexOf(")") - FieldInfo.IndexOf("(") - 1);
                cursor = _TarLayer.FeatureClass.Update(null, false);
                int count = _TarLayer.FeatureClass.FeatureCount(null);
                ProgressHelper.CountProgress = count;
                int num = 0;
                int idx = _TarLayer.FeatureClass.FindField(FieldInfo);
                while ((f = cursor.NextFeature()) != null)
                {
                    if (num % 100 == 0 || num == count)
                    {
                        ProgressHelper.CurrentProgress = num;
                    }
                    if (idx == -1) continue;
                    double mj = f.ShapeCopy.GetEllipseArea();
                    f.Value[idx] = mj.ToDouble(2);
                    cursor.UpdateFeature(f);
                    Marshal.ReleaseComObject(f);
                }
                this.CloseLoading();
                MessageHelper.ShowTips("椭球面积计算成功!");
                this.Close();
            }
            catch (Exception ex)
            {
                this.CloseLoading();
                MessageHelper.Show("椭球面积计算失败！");
                LogAPI.Debug("椭球面积计算时发生异常：");
                LogAPI.Debug(ex);
            }
            finally
            {
                if (cursor != null)
                    Marshal.ReleaseComObject(cursor);
            }
        }

        private void BtnCancel_Click(object sender, RoutedEventArgs e)
        {
            this.Close();
        }
    }
}