//开始查询
        private void btn_Apply_Click(object sender, EventArgs e)
        {
            string caption = cbox_Layers.Text;

            if (caption == "")
            {
                MessageBox.Show("请先添加图层", "提示");
                return;
            }
            GSOLayer layer = globeControl1.Globe.Layers.GetLayerByCaption(caption);

            if (layer == null)
            {
                return;
            }

            if (!checkBox1.Checked)
            {
                GSOFeatures features = layer.GetAllFeatures();
                for (int i = 0; i < features.Length; i++)
                {
                    GSOFeature newfeature = features[i];

                    GSOGeoPolyline3D line = newfeature.Geometry as GSOGeoPolyline3D;
                    if (line == null)
                    {
                        continue;
                    }
                    GSOPipeLineStyle3D pipeLineStyle = line.Style as GSOPipeLineStyle3D;


                    // 管线暂不支持依地模式

                    if (pipeLineStyle == null)
                    {
                        pipeLineStyle = new GSOPipeLineStyle3D();
                    }

                    pipeLineStyle.LineColor = buttonPipelineColor.BackColor;
                    line.Style = pipeLineStyle;
                }
            }
            else
            {
                string sql = "select * from " + cbox_Layers.Text.Trim();
                if (textBox_WhereClause.Text != "")
                {
                    sql += " where " + textBox_WhereClause.Text;
                    try
                    {
                        if (layer.Dataset == null || layer.Dataset.DataSource == null ||
                            (layer.Dataset.DataSource.Type != EnumDataSourceType.SqlServer && layer.Dataset.DataSource.Type != EnumDataSourceType.Oracle))
                        {
                            return;
                        }
                        DatabaseConnectParams connectParams = Utility.getConnectParamsByDatasourceName(globeControl1, layer.Dataset.DataSource.Name);
                        if (connectParams == null)
                        {
                            return;
                        }
                        DataTable table = OledbHelper.QueryTable(sql, connectParams);
                        if (table == null)
                        {
                            return;
                        }

                        for (int i = 0; i < table.Rows.Count; i++)
                        {
                            int        id         = Convert.ToInt32(table.Rows[i]["LSSYS_ID"]);
                            GSOFeature newfeature = layer.GetFeatureByID(id);

                            GSOGeoPolyline3D line = newfeature.Geometry as GSOGeoPolyline3D;
                            if (line == null)
                            {
                                continue;
                            }
                            GSOPipeLineStyle3D pipeLineStyle = line.Style as GSOPipeLineStyle3D;

                            // 管线暂不支持依地模式
                            if (pipeLineStyle == null)
                            {
                                pipeLineStyle = new GSOPipeLineStyle3D();
                            }
                            pipeLineStyle.LineColor = buttonPipelineColor.BackColor;
                            line.Style = pipeLineStyle;
                        }
                    }
                    catch (Exception ex)
                    {
                        Log.PublishTxt(ex);
                        MessageBox.Show(ex.Message, "提示");
                        return;
                    }
                }
            }

            globeControl1.Refresh();
            return;
        }