c# arcgis批量转换mdb中某一图层到shp

 

// 转换
        private void btnTransfer_Click(object sender, EventArgs e)
        {
            this.lblInfo.Text = "开始转换...";

            string sourceLayerName = this.tbxLayerName.Text;

            string targetPath = this.tbxShpPath.Text;

            FindAllFiles(this.tbxMdbPath.Text);

            foreach (string mdbFile in fileList)
            {
                string sourcePath = System.IO.Path.GetDirectoryName(mdbFile);
                string sourceFileName = System.IO.Path.GetFileName(mdbFile);
                bool bb = ExportShp(sourcePath, sourceFileName, sourceLayerName, targetPath);

                if (bb == false)
                {
                    MessageBox.Show("检查mdb文件是否已经打开被占用...", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    return;
                }
            }
            this.lblInfo.Text = "转换完成!";
            MessageBox.Show("转换完成!", "成功", MessageBoxButtons.OK, MessageBoxIcon.Information);

        }

private bool ExportShp(string sourcePath, string sourceFileName, string layerName, string targetPath)
        {
            // Create a name object for the source (shapefile) workspace and open it.
            // 打开源mdb文件
            IWorkspaceName sourceWorkspaceName = new WorkspaceNameClass
            {
                WorkspaceFactoryProgID = "esriDataSourcesGDB.AccessWorkspaceFactory",
                PathName = sourcePath + "\\" + sourceFileName
            };


            IName sourceWorkspaceIName = null;
            IWorkspace sourceWorkspace = null;

            try
            {
                sourceWorkspaceIName = (IName)sourceWorkspaceName;
                sourceWorkspace = (IWorkspace)sourceWorkspaceIName.Open();
            }
            catch (Exception)
            {
                return false;
            }
             

            // Create a name object for the target (file GDB) workspace and open it.
            // 创建输出空间
            IWorkspaceName targetWorkspaceName = new WorkspaceNameClass
            {
                WorkspaceFactoryProgID = "esriDataSourcesFile.ShapefileWorkspaceFactory",
                PathName = targetPath
            };
            IName targetWorkspaceIName = (IName)targetWorkspaceName;
            IWorkspace targetWorkspace = (IWorkspace)targetWorkspaceIName.Open();

            // Create a name object for the source dataset. 
            // 创建源数据集名称
            IFeatureClassName sourceFeatureClassName = new FeatureClassNameClass();
            IDatasetName sourceDatasetName = (IDatasetName)sourceFeatureClassName;
            sourceDatasetName.Name = layerName;
            sourceDatasetName.WorkspaceName = sourceWorkspaceName;

            // Create a name object for the target dataset. 
            // 创建目标数据集名称
            IFeatureClassName targetFeatureClassName = new FeatureClassNameClass();
            IDatasetName targetDatasetName = (IDatasetName)targetFeatureClassName;
            targetDatasetName.Name = sourceFileName.Substring(0, sourceFileName.IndexOf(".")) + layerName;
            targetDatasetName.WorkspaceName = targetWorkspaceName;

            // Open source feature class to get field definitions.
            // 打开源数据集字段定义
            IName sourceName = null;
            IFeatureClass sourceFeatureClass = null;
            try
            {
                sourceName = (IName)sourceFeatureClassName;
                sourceFeatureClass = (IFeatureClass)sourceName.Open();
            }
            catch (Exception ex)
            {
                return true;
            }


            // Create the objects and references necessary for field validation.
            // 创建字段验证
            IFieldChecker fieldChecker = new FieldCheckerClass();
            IFields sourceFields = sourceFeatureClass.Fields;
            IFields targetFields = null;
            IEnumFieldError enumFieldError = null;

            // Set the required properties for the IFieldChecker interface.
            // 设置字段验证接口的属性
            fieldChecker.InputWorkspace = sourceWorkspace;
            fieldChecker.ValidateWorkspace = targetWorkspace;

            // Validate the fields and check for errors.
            // 验证字段 检查错误
            fieldChecker.Validate(sourceFields, out enumFieldError, out targetFields);

            if (enumFieldError != null)
            {
                // Handle the errors in a way appropriate to your application.
                MessageBox.Show("Errors were encountered during field validation.");
            }

            // Find the shape field.
            // 找shp字段
            String shapeFieldName = sourceFeatureClass.ShapeFieldName;
            int shapeFieldIndex = sourceFeatureClass.FindField(shapeFieldName);
            IField shapeField = sourceFields.get_Field(shapeFieldIndex);

            // Get the geometry definition from the shape field and clone it.
            // 克隆几何字段
            IGeometryDef geometryDef = shapeField.GeometryDef;
            IClone geometryDefClone = (IClone)geometryDef;
            IClone targetGeometryDefClone = geometryDefClone.Clone();
            IGeometryDef targetGeometryDef = (IGeometryDef)targetGeometryDefClone;

            // Create a query filter
            // 创建过滤器
            IQueryFilter queryFilter = new QueryFilterClass();
            queryFilter.WhereClause = "";

            // Create the converter and run the conversion.
            // 创建转换器
            IFeatureDataConverter featureDataConverter = new FeatureDataConverterClass();
            IEnumInvalidObject enumInvalidObject = featureDataConverter.ConvertFeatureClass(
                sourceFeatureClassName, queryFilter, null, targetFeatureClassName,
                targetGeometryDef, targetFields, "", 1000, 0);

            // Check for errors.
            // 检查错误
            IInvalidObjectInfo invalidObjectInfo = null;
            enumInvalidObject.Reset();
            while ((invalidObjectInfo = enumInvalidObject.Next()) != null)
            {
                MessageBox.Show("Errors occurred for the following feature: " + invalidObjectInfo.InvalidObjectID.ToString());
            }

            return true;
        }

// 遍历文件夹及子文件夹
        List<string> fileList = new List<string>();
        private void FindAllFiles(string path)
        {
            DirectoryInfo drInfo = new DirectoryInfo(path);

            // 获取当前目录下.mdb文件, 添加至fileList
            FileInfo[] fi = drInfo.GetFiles();
            foreach (FileInfo item in fi)
            {
                if (item.Extension==".mdb"||item.Extension==".MDB")
                {
                    fileList.Add(item.FullName);
                }
            }

            // 获取当前目录下所有子文件夹, 并递归遍历所有子文件夹
            DirectoryInfo[] subDirs = drInfo.GetDirectories();
            foreach (DirectoryInfo subDir in subDirs)
            {
                string subFile = subDir.FullName + "\\";
                FindAllFiles(subFile);
            }
        }

 其中ExportShp函数来源于: http://resources.arcgis.com/en/help/arcobjects-net/conceptualhelp/index.html#/Converting_and_transferring_data/0001000003rp000000/