C# IFeatureSet.Intersection方法代码示例

        /// <summary>
        /// Executes the ClipPolygonWithPolygon tool with programatic input
        /// </summary>
        /// <param name="input">The input feature set to clip</param>
        /// <param name="input2">The input polygon feature set to clip with</param>
        /// <param name="output">The output feature set</param>
        /// <param name="cancelProgressHandler">The progress handler for progress message updates</param>
        /// <returns></returns>
        /// Ping delete "static" for external testing
        public bool Execute(
            IFeatureSet input, IFeatureSet input2, IFeatureSet output, ICancelProgressHandler cancelProgressHandler)
        {
            // Validates the input and output data
            if (input == null || input2 == null || output == null)
            {
                cancelProgressHandler.Progress(string.Empty, 100, TextStrings.Oneparameterinnull);
                return false;
            }

            if (input2.FeatureType != FeatureType.Polygon)
            {
                cancelProgressHandler.Progress(string.Empty, 100, TextStrings.secondinputlayer);
                return false;
            }

            output.FeatureType = input.FeatureType;

            // we add all the old features to output
            IFeatureSet tempoutput = input.Intersection(input2, FieldJoinType.LocalOnly, cancelProgressHandler);

            // We add all the fields
            foreach (DataColumn inputColumn in tempoutput.DataTable.Columns)
            {
                output.DataTable.Columns.Add(new DataColumn(inputColumn.ColumnName, inputColumn.DataType));
            }

            foreach (var fe in tempoutput.Features)
            {
                output.Features.Add(fe);
            }

            output.SaveAs(output.Filename, true);
            return true;
        }

        /// <summary>
        /// Executes the Union Opaeration tool programaticaly
        /// </summary>
        /// <param name="self">The input are feature set</param>
        /// <param name="other">The second input feature set</param>
        /// <param name="output">The output feature set</param>
        /// <param name="cancelProgressHandler">The progress handler</param>
        /// <returns></returns>
        public bool Execute(
            IFeatureSet self, IFeatureSet other, IFeatureSet output, ICancelProgressHandler cancelProgressHandler)
        {
            // Validates the input and output data
            if (self == null || other == null || output == null)
            {
                return false;
            }

            IFeatureSet tempOutput = self.Intersection(other, FieldJoinType.All, null);
            IFeatureSet tempFeatureSet = self.CombinedFields(other);

            int previous = 0;
            int max = self.Features.Count;

            // Take (Self-Intersect Featureset)
            List<IFeature> intersectList;
            for (int i = 0; i < self.Features.Count; i++)
            {
                intersectList = other.Select(self.Features[i].Envelope.ToExtent());
                foreach (IFeature feat in intersectList)
                {
                    if (cancelProgressHandler.Cancel)
                    {
                        return false;
                    }

                    self.Features[i].Difference(feat, tempFeatureSet, FieldJoinType.LocalOnly);
                }

                if (Math.Round(i * 40D / max) <= previous)
                {
                    continue;
                }

                previous = Convert.ToInt32(Math.Round(i * 40D / max));
                cancelProgressHandler.Progress(string.Empty, previous, previous + TextStrings.progresscompleted);
            }

            max = other.Features.Count;

            // Take (Other-Intersect Featureset)
            for (int i = 0; i < other.Features.Count; i++)
            {
                intersectList = self.Select(other.Features[i].Envelope.ToExtent());
                foreach (IFeature feat in intersectList)
                {
                    if (cancelProgressHandler.Cancel)
                    {
                        return false;
                    }

                    other.Features[i].Difference(feat, tempFeatureSet, FieldJoinType.LocalOnly);
                }

                if (Math.Round((i * 40D / max) + 40D) <= previous)
                {
                    continue;
                }

                previous = Convert.ToInt32(Math.Round((i * 40D / max) + 40D));
                cancelProgressHandler.Progress(string.Empty, previous, previous + TextStrings.progresscompleted);
            }

            max = tempFeatureSet.Features.Count;
            output.CopyTableSchema(tempFeatureSet);

            // Add the individual feature to output
            for (int i = 0; i < tempFeatureSet.Features.Count; i++)
            {
                output.Features.Add(tempFeatureSet.Features[i]);
                if (Math.Round((i * 10D / max) + 80D) <= previous)
                {
                    continue;
                }

                previous = Convert.ToInt32(Math.Round((i * 10D / max) + 80D));
                if (cancelProgressHandler.Cancel)
                {
                    return false;
                }

                cancelProgressHandler.Progress(string.Empty, previous, previous + TextStrings.progresscompleted);
            }

            max = tempOutput.Features.Count;

            // Add the Intersect feature to output
            for (int i = 0; i < tempOutput.Features.Count; i++)
            {
                output.Features.Add(tempOutput.Features[i]);
                if (cancelProgressHandler.Cancel)
//.........这里部分代码省略.........