C# 小技巧（不定时更新）

1、Arcengine调用GP服务，抛出异常方法

                    object sev = null;
                    try
                    {
                        Application.DoEvents();
                        gp.Execute(gpBuildPyramidsandStatistics, null);
                        Application.DoEvents();
                        Console.WriteLine(gp.GetMessages(ref sev));
                    }
                    catch (Exception ex)
                    {
                        // Print geoprocessing execution error messages.
                        MessageBox.Show(gp.GetMessages(ref sev));
                    }

//ps:调用GP服务处理数据库中的数据，必须添加gp的环境变量workspace.http://www.ithao123.cn/content-7464230.html

2、日志生成

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Windows.Forms;

namespace Geoway.IDB.FileCheck.Utility
{
    ///<summary>
    ///目的：日志操作类
    ///创建人：jwh
    ///创建日期：2016/7/11
    ///修改描述：
    ///修改人：
    ///修改日期：
    ///备注：
    ///</summary>
    public class LogExport
    {
        private static object _lockerForLog = new object();
        public static string LOGPATH = Application.StartupPath + "\\log\\checklog";//日志文件夹

        /// <summary>
        /// 记录日志
        /// </summary>
        /// <param name="content"></param>
        /// <param name="logPath"></param>
        public static void SaveLog(string content, string logPath = "")
        {
            try
            {
                if (string.IsNullOrEmpty(logPath))
                {
                    logPath = LOGPATH;
                }

                lock (_lockerForLog)
                {
                    FileStream fs;
                    if (!Directory.Exists(logPath))
                    {
                        Directory.CreateDirectory(logPath);
                    }
                    fs = new FileStream(Path.Combine(logPath, DateTime.Now.ToString("yyyyMMdd") + ".log"), FileMode.OpenOrCreate);
                    StreamWriter streamWriter = new StreamWriter(fs);
                    streamWriter.BaseStream.Seek(0, SeekOrigin.End);
                    streamWriter.WriteLine(DateTime.Now.ToString("yyyy-MM-dd-HH:mm:ss") + " " + content);
                    streamWriter.Flush();
                    streamWriter.Close();
                    fs.Close();
                }
            }
            catch
            {
            }
        }
    }
}

3、获取数据库中的镶嵌数据集

 /// <summary>
        /// 获取界面上选择的镶嵌数据集
        /// </summary>
        /// <returns></returns>
        public IMosaicDataset GetMosaicDataset()
        {
            try
            {
                _selMosicName = cmbMosicData.SelectedItem.ToString();           

                IPropertySet propertySet = new PropertySetClass();
                propertySet.SetProperty("SERVER", "");
                propertySet.SetProperty("INSTANCE", "sde:oracle11g:XXX.XXX.XXX/db11g");
                propertySet.SetProperty("USER", "XXX");

                propertySet.SetProperty("PASSWORD", "XXX");
                propertySet.SetProperty("DATABASE", "");
                propertySet.SetProperty("VERSION", "");
                IWorkspaceFactory2 workspaceFactory2 = new SdeWorkspaceFactoryClass();
                IWorkspace pWorkspace = workspaceFactory2.Open(propertySet, 0);

                IMosaicDataset pMosicDataset = null;
                IMosaicWorkspaceExtensionHelper pMosaicWsExHelper = new MosaicWorkspaceExtensionHelperClass();
                IMosaicWorkspaceExtension pMosaicWsExt = pMosaicWsExHelper.FindExtension(pWorkspace);
                if (pMosaicWsExt != null)
                {
                    try
                    {
                        pMosicDataset = pMosaicWsExt.OpenMosaicDataset(_selMosicName);
                    }
                    catch (Exception ex)
                    {
                        return pMosicDataset;
                    }
                }
                return pMosicDataset;
            }
            catch (Exception ex)
            {
                return null;
            }
        }