ArcEngine开发代码
1、打开Shapefile
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1 private IFeatureLayer OpenShapeFile(string pPath) 2 { 3 IWorkspaceFactory pWorkspaceFactory = new ShapefileWorkspaceFactory(); // 1 4 string pFolder = System.IO.Path.GetDirectoryName(pPath); 5 string pFileName = System.IO.Path.GetFileName(pPath); 6 IWorkspace pWorkspace = pWorkspaceFactory.OpenFromFile(pFolder, 0); // 2 7 IFeatureWorkspace pFeatureWorkspace = pWorkspace as IFeatureWorkspace; 8 IFeatureClass pFC = pFeatureWorkspace.OpenFeatureClass(pFileName); //3 9 IFeatureLayer pFLayer = new FeatureLayerClass(); // 4 10 pFLayer.FeatureClass = pFC; 11 pFLayer.Name = pFC.AliasName; // 5 12 return pFLayer; 13 }
2、进行空间查询
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1 private IFeatureCursor GetSpatialFeatureCursor(IFeatureLayer pFlayer, IGeometry pGeo) 2 { 3 IGeometry pointGemetry = pGeo; 4 ISpatialFilter pointSpatialFilter = new SpatialFilterClass(); 5 pointSpatialFilter.Geometry = pointGemetry; 6 pointSpatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects; 7 pointSpatialFilter.GeometryField = "Shape"; 8 IFeatureLayer pointFeatureLayer = pFlayer; 9 IFeatureClass pointFeatureClass = pointFeatureLayer.FeatureClass; 10 IFeatureCursor pointFeatureCursor = pointFeatureClass.Search(pointSpatialFilter, false); 11 return pointFeatureCursor; 12 }
3、进行属性查询
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1 private IFeatureCursor GetQueryFeatureCursor(IFeatureLayer pFlayer, string whereclause) 2 { 3 IQueryFilter2 pQueryFilter = new QueryFilterClass(); 4 pQueryFilter.WhereClause = whereclause; 5 IFeatureCursor pFeatureCursor; 6 pFeatureCursor = pFlayer.FeatureClass.Search(pQueryFilter, false); 7 return pFeatureCursor; 8 }
4、绑定以及权限初始化类
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1 internal sealed class LicenseInitializer 2 { 3 private IAoInitialize m_AoInit = new AoInitializeClass(); 4 5 #region Private members 6 private const string MessageNoLicensesRequested = "Product: No licenses were requested"; 7 private const string MessageProductAvailable = "Product: {0}: Available"; 8 private const string MessageProductNotLicensed = "Product: {0}: Not Licensed"; 9 private const string MessageExtensionAvailable = " Extension: {0}: Available"; 10 private const string MessageExtensionNotLicensed = " Extension: {0}: Not Licensed"; 11 private const string MessageExtensionFailed = " Extension: {0}: Failed"; 12 private const string MessageExtensionUnavailable = " Extension: {0}: Unavailable"; 13 14 private bool m_hasShutDown = false; 15 private bool m_hasInitializeProduct = false; 16 17 private List<int> m_requestedProducts; 18 private List<esriLicenseExtensionCode> m_requestedExtensions; 19 private Dictionary<esriLicenseProductCode, esriLicenseStatus> m_productStatus = new Dictionary<esriLicenseProductCode, esriLicenseStatus>(); 20 private Dictionary<esriLicenseExtensionCode, esriLicenseStatus> m_extensionStatus = new Dictionary<esriLicenseExtensionCode, esriLicenseStatus>(); 21 22 private bool m_productCheckOrdering = true; //default from low to high 23 #endregion 24 25 public bool InitializeApplication(esriLicenseProductCode[] productCodes, esriLicenseExtensionCode[] extensionLics) 26 { 27 //Cache product codes by enum int so can be sorted without custom sorter 28 m_requestedProducts = new List<int>(); 29 foreach (esriLicenseProductCode code in productCodes) 30 { 31 int requestCodeNum = Convert.ToInt32(code); 32 if (!m_requestedProducts.Contains(requestCodeNum)) 33 { 34 m_requestedProducts.Add(requestCodeNum); 35 } 36 } 37 38 AddExtensions(extensionLics); 39 return Initialize(); 40 } 41 42 /// <summary> 43 /// A summary of the status of product and extensions initialization. 44 /// </summary> 45 public string LicenseMessage() 46 { 47 string prodStatus = string.Empty; 48 if (m_productStatus == null || m_productStatus.Count == 0) 49 { 50 prodStatus = MessageNoLicensesRequested + Environment.NewLine; 51 } 52 else if (m_productStatus.ContainsValue(esriLicenseStatus.esriLicenseAlreadyInitialized) 53 || m_productStatus.ContainsValue(esriLicenseStatus.esriLicenseCheckedOut)) 54 { 55 prodStatus = ReportInformation(m_AoInit as ILicenseInformation, 56 m_AoInit.InitializedProduct(), 57 esriLicenseStatus.esriLicenseCheckedOut) + Environment.NewLine; 58 } 59 else 60 { 61 //Failed... 62 foreach (KeyValuePair<esriLicenseProductCode, esriLicenseStatus> item in m_productStatus) 63 { 64 prodStatus += ReportInformation(m_AoInit as ILicenseInformation, 65 item.Key, item.Value) + Environment.NewLine; 66 } 67 } 68 69 string extStatus = string.Empty; 70 foreach (KeyValuePair<esriLicenseExtensionCode, esriLicenseStatus> item in m_extensionStatus) 71 { 72 string info = ReportInformation(m_AoInit as ILicenseInformation, item.Key, item.Value); 73 if (!string.IsNullOrEmpty(info)) 74 extStatus += info + Environment.NewLine; 75 } 76 77 string status = prodStatus + extStatus; 78 return status.Trim(); 79 } 80 81 /// <summary> 82 /// Shuts down AoInitialize object and check back in extensions to ensure 83 /// any ESRI libraries that have been used are unloaded in the correct order. 84 /// </summary> 85 /// <remarks>Once Shutdown has been called, you cannot re-initialize the product license 86 /// and should not make any ArcObjects call.</remarks> 87 public void ShutdownApplication() 88 { 89 if (m_hasShutDown) 90 return; 91 92 //Check back in extensions 93 foreach (KeyValuePair<esriLicenseExtensionCode, esriLicenseStatus> item in m_extensionStatus) 94 { 95 if (item.Value == esriLicenseStatus.esriLicenseCheckedOut) 96 m_AoInit.CheckInExtension(item.Key); 97 } 98 99 m_requestedProducts.Clear(); 100 m_requestedExtensions.Clear(); 101 m_extensionStatus.Clear(); 102 m_productStatus.Clear(); 103 m_AoInit.Shutdown(); 104 m_hasShutDown = true; 105 //m_hasInitializeProduct = false; 106 } 107 108 /// <summary> 109 /// Indicates if the extension is currently checked out. 110 /// </summary> 111 public bool IsExtensionCheckedOut(esriLicenseExtensionCode code) 112 { 113 return m_AoInit.IsExtensionCheckedOut(code); 114 } 115 116 /// <summary> 117 /// Set the extension(s) to be checked out for your ArcObjects code. 118 /// </summary> 119 public bool AddExtensions(params esriLicenseExtensionCode[] requestCodes) 120 { 121 if (m_requestedExtensions == null) 122 m_requestedExtensions = new List<esriLicenseExtensionCode>(); 123 foreach (esriLicenseExtensionCode code in requestCodes) 124 { 125 if (!m_requestedExtensions.Contains(code)) 126 m_requestedExtensions.Add(code); 127 } 128 129 if (m_hasInitializeProduct) 130 return CheckOutLicenses(this.InitializedProduct); 131 132 return false; 133 } 134 135 /// <summary> 136 /// Check in extension(s) when it is no longer needed. 137 /// </summary> 138 public void RemoveExtensions(params esriLicenseExtensionCode[] requestCodes) 139 { 140 if (m_extensionStatus == null || m_extensionStatus.Count == 0) 141 return; 142 143 foreach (esriLicenseExtensionCode code in requestCodes) 144 { 145 if (m_extensionStatus.ContainsKey(code)) 146 { 147 if (m_AoInit.CheckInExtension(code) == esriLicenseStatus.esriLicenseCheckedIn) 148 { 149 m_extensionStatus[code] = esriLicenseStatus.esriLicenseCheckedIn; 150 } 151 } 152 } 153 } 154 155 /// <summary> 156 /// Get/Set the ordering of product code checking. If true, check from lowest to 157 /// highest license. True by default. 158 /// </summary> 159 public bool InitializeLowerProductFirst 160 { 161 get 162 { 163 return m_productCheckOrdering; 164 } 165 set 166 { 167 m_productCheckOrdering = value; 168 } 169 } 170 171 /// <summary> 172 /// Retrieves the product code initialized in the ArcObjects application 173 /// </summary> 174 public esriLicenseProductCode InitializedProduct 175 { 176 get 177 { 178 try 179 { 180 return m_AoInit.InitializedProduct(); 181 } 182 catch 183 { 184 return 0; 185 } 186 } 187 } 188 189 #region Helper methods 190 private bool Initialize() 191 { 192 if (m_requestedProducts == null || m_requestedProducts.Count == 0) 193 return false; 194 195 esriLicenseProductCode currentProduct = new esriLicenseProductCode(); 196 bool productInitialized = false; 197 198 //Try to initialize a product 199 ILicenseInformation licInfo = (ILicenseInformation)m_AoInit; 200 201 m_requestedProducts.Sort(); 202 if (!InitializeLowerProductFirst) //Request license from highest to lowest 203 m_requestedProducts.Reverse(); 204 205 foreach (int prodNumber in m_requestedProducts) 206 { 207 esriLicenseProductCode prod = (esriLicenseProductCode)Enum.ToObject(typeof(esriLicenseProductCode), prodNumber); 208 esriLicenseStatus status = m_AoInit.IsProductCodeAvailable(prod); 209 if (status == esriLicenseStatus.esriLicenseAvailable) 210 { 211 status = m_AoInit.Initialize(prod); 212 if (status == esriLicenseStatus.esriLicenseAlreadyInitialized || 213 status == esriLicenseStatus.esriLicenseCheckedOut) 214 { 215 productInitialized = true; 216 currentProduct = m_AoInit.InitializedProduct(); 217 } 218 } 219 220 m_productStatus.Add(prod, status); 221 222 if (productInitialized) 223 break; 224 } 225 226 m_hasInitializeProduct = productInitialized; 227 m_requestedProducts.Clear(); 228 229 //No product is initialized after trying all requested licenses, quit 230 if (!productInitialized) 231 { 232 return false; 233 } 234 235 //Check out extension licenses 236 return CheckOutLicenses(currentProduct); 237 } 238 239 private bool CheckOutLicenses(esriLicenseProductCode currentProduct) 240 { 241 bool allSuccessful = true; 242 //Request extensions 243 if (m_requestedExtensions != null && currentProduct != 0) 244 { 245 foreach (esriLicenseExtensionCode ext in m_requestedExtensions) 246 { 247 esriLicenseStatus licenseStatus = m_AoInit.IsExtensionCodeAvailable(currentProduct, ext); 248 if (licenseStatus == esriLicenseStatus.esriLicenseAvailable)//skip unavailable extensions 249 { 250 licenseStatus = m_AoInit.CheckOutExtension(ext); 251 } 252 allSuccessful = (allSuccessful && licenseStatus == esriLicenseStatus.esriLicenseCheckedOut); 253 if (m_extensionStatus.ContainsKey(ext)) 254 m_extensionStatus[ext] = licenseStatus; 255 else 256 m_extensionStatus.Add(ext, licenseStatus); 257 } 258 259 m_requestedExtensions.Clear(); 260 } 261 262 return allSuccessful; 263 } 264 265 266 private string ReportInformation(ILicenseInformation licInfo, 267 esriLicenseProductCode code, esriLicenseStatus status) 268 { 269 string prodName = string.Empty; 270 try 271 { 272 prodName = licInfo.GetLicenseProductName(code); 273 } 274 catch 275 { 276 prodName = code.ToString(); 277 } 278 279 string statusInfo = string.Empty; 280 281 switch (status) 282 { 283 case esriLicenseStatus.esriLicenseAlreadyInitialized: 284 case esriLicenseStatus.esriLicenseCheckedOut: 285 statusInfo = string.Format(MessageProductAvailable, prodName); 286 break; 287 default: 288 statusInfo = string.Format(MessageProductNotLicensed, prodName); 289 break; 290 } 291 292 return statusInfo; 293 } 294 private string ReportInformation(ILicenseInformation licInfo, 295 esriLicenseExtensionCode code, esriLicenseStatus status) 296 { 297 string extensionName = string.Empty; 298 try 299 { 300 extensionName = licInfo.GetLicenseExtensionName(code); 301 } 302 catch 303 { 304 extensionName = code.ToString(); 305 } 306 307 string statusInfo = string.Empty; 308 309 switch (status) 310 { 311 case esriLicenseStatus.esriLicenseAlreadyInitialized: 312 case esriLicenseStatus.esriLicenseCheckedOut: 313 statusInfo = string.Format(MessageExtensionAvailable, extensionName); 314 break; 315 case esriLicenseStatus.esriLicenseCheckedIn: 316 break; 317 case esriLicenseStatus.esriLicenseUnavailable: 318 statusInfo = string.Format(MessageExtensionUnavailable, extensionName); 319 break; 320 case esriLicenseStatus.esriLicenseFailure: 321 statusInfo = string.Format(MessageExtensionFailed, extensionName); 322 break; 323 default: 324 statusInfo = string.Format(MessageExtensionNotLicensed, extensionName); 325 break; 326 } 327 328 return statusInfo; 329 } 330 #endregion 331 332 }