求助高手！类结构或接口成员中声明的无效！急急！

楼主^#

更多发布于：2010-05-16 17:16

using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using ESRI.ArcGIS.ADF.Web.UI.WebControls; using System.Collections.Specialized; using ESRI.ArcGIS.ADF.Web.DataSources; using System.Collections.Generic; using ESRI.ArcGIS.ADF.Web; using ESRI.ArcGIS.ADF.Web.Display.Graphics;
namespace MappingApp { public class MapIdentify { private Page m_page; private Map m_map; private string m_callbackInvocation=""; private string m_filePath=""; private int m_numberDecimals=3; private IdentifyOption m_idOption = IdentifyOption.VisibleLayers; public int m_IdentifyTolerance = 5; private TaskResults m_resultsDisplay = null; private DataSet m_dataset; public MapIdentify() { } public MapIdentify(Map map) { if (map != null) { m_map = map; SetupIdentify(); } } public MapIdentify(Map map, string filePath) { m_map = map; m_filePath = filePath; SetupIdentify(); } public void SetupIdentify() { m_page = m_page.Page; System.Text.StringBuilder sb = new System.Text.StringBuilder(); m_callbackInvocation = m_page.ClientScript.GetCallbackEventReference(m_page, "message", "processCallbackResult", "context", true); sb.Append("\n<script language=\"javascript\" type=\"text/javascript\" src=\"" + m_filePath + "JavaScript/display_mapidentify.js\" ></script>\n"); sb.Append("<script language=\"javascript\" type=\"text/javascript\">var identifyCallbackFunctionString = \"" + m_callbackInvocation + "\";</script>\n"); if (!m_page.ClientScript.IsClientScriptBlockRegistered("IdentifyScript")) { m_page.ClientScript.RegisterClientScriptBlock(m_page.GetType(), "IdentifyScript", sb.ToString());
 } } public string Identify(NameValueCollection queryString) { string xString = queryString["minx"]; string yString = queryString["miny"]; string locXString = ""; string locYString = ""; int x = Convert.ToInt32(xString); int y = Convert.ToInt32(yString); IGISDataSource resource; IQueryFunctionality query; ESRI.ArcGIS.ADF.Web.Geometry.Point mapPoint = ESRI.ArcGIS.ADF.Web.Geometry.Point.ToMapPoint(x, y, m_map.GetTransformationParams(ESRI.ArcGIS.ADF.Web.Geometry.TransformationDirection.ToMap)); List<DataSet> gdslist = new List<DataSet>(); foreach (ImapFunctionality mapFunc in m_map.GetFunctionalities()) { if (mapFunc is ESRI.ArcGIS.ADF.Web.DataSources.Graphics.MapFunctionality) { continue; } resource = mapFunc.Resource; query = resource.CreateFunctionality(typeof(ESRI.ArcGIS.ADF.Web.DataSources.IQueryFunctionality), "identify_") as IQueryFunctionality; string[] layerIds; string[] layerNames; query.GetQueryableLayers(null, out layerIds, out layerNames); string resourceType = resource.DataSource.GetType().Tostring(); double roundFactor = Math.Pow(10, m_numberDecimals); string pointXString = Convert.ToString(Math.Round(mapPoint.X * roundFactor) / roundFactor); string pointYString = Convert.ToString(Math.Round(mapPoint.Y * roundFactor) / roundFactor); locXString = pointXString; locYString = pointYString; DataTable[] ds = null; try { ds = query.Identify(mapFunc.Name, mapPoint, m_IdentifyTolerance, m_idOption, null); } catch(Exception e) { DataTable table = new DataTable(); table.TableName = "Identify Error:" + e.Message; ds = new DataTable[] { table };
 } if (ds != null ;; ds.Length > 0) { DataSet gds = new DataSet(); DataTable table; for (int j = ds.Length - 1; j >= 0; j--) { table = ds[j]; if (table.Rows.Count == 0 ;; table.TableName.IndexOf("Error") < 0) { continue; } GraphicsLayer layer = ESRI.ArcGIS.ADF.Web.Converter.ToGraphicsLayer(table, System.Drawing.Color.Empty, System.Drawing.Color.Aqua); if (layer != null) { gds.Tables.Add(layer); } else { gds.Tables.Add(table); } } if (gds.Tables.Count == 0) { continue; } gds.DataSetName = resource.Name + "(" + pointXString + "," + pointYString + ")"; gdslist.Add(gds); } } for (int i = gdslist.Count - 1; i >= 0; i--) { m_resultsDisplay.DisplayResults(null, null, null, gdslist); } if (gdslist.Count == 0) { string heading = "Location(" + locXString + "," + locYString + ")No results found"; string detail = "No results found"; SimpleTaskResult str = new SimpleTaskResult(heading, detail); m_resultsDisplay.DisplayResults(null, null, null, str); } return m_resultsDisplay.CallbackResults.ToString(); } public Map Map { get { return m_map; } set { m_map = value; }
 } public Page Page { get { return m_page; } set { m_page = value; }
 } public DataSet DataSet { get { return m_dataset; } set { m_dataset = value; } } public string ClientCallbackInvocation { get { return m_callbackInvocation; } set { m_callbackInvocation = value; } } public string FilePath { get { return m_filePath; } set { m_filePath = value; } } public TaskResults ResultsDisplay { get { return m_resultsDisplay; } set { m_resultsDisplay = value; } } public int NumberDecimals { get { return m_numberDecimals; } set { m_numberDecimals = value; } } } }
public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { MapIdentify identify = new MapIdentify(Map1); identify.ResultsDisplay = TaskResults; identify.NumberDecimals = 4; } public virtual string RaiseCallbackEvent(string responseString) { Array keyValuePairs = responseString.Split(";".ToCharArray()); NameValueCollection m_queryString = new NameValueCollection(); string[] keyvalue; string response = ""; if (keyValuePairs.Length > 0) { for (int i = 0; i < keyValuePairs.Length; i++) { keyvalue = keyValuePairs.GetValue(i).ToString().Split("=".ToCharArray()); m_queryString.Add(key[0], keyvalue[1]); } } else { keyvalue = responseString.Split("=".ToCharArray()); if (keyvalue.Length > 0) { m_queryString.Add(keyvalue[0], keyvalue[1]); } } string controlType = m_queryString("ControlType"); string eventArg = m_queryString("EventArg"); if (controlType == null) { controlType = "Map"; } swith(controlType) { case "Map": if(eventArg=="CloseOutApplication") { IServerConText context; for(int i=0;i<Session.Count;i++) { context=Session as IServerContext; } if(context!=null) { context.RemoveAll(); context.ReleaseContext(); } } Session.RemoveAll(); response=ConfigurationManager.AppSettings["CloseOutUrl"]; if(response==null||response.Length==0) { response="ApplicationClosed.aspx"; } } else if (eventArg=="GetCopyrightText") { System.Text.StringBuilder sb=new System.Text.StringBuilder(); sb.AppendFormat("///:::{0}:::innercontent:::", "CopyrightTextContents"); int sbLength=sb.Length; sb.Append(GetCopyrightText()); if(sb.Length==sbLength) { sb.Append("no copyright information available."); } response=sb.ToString();
 } else if (eventArg=="MapIdentify") { if(Identify!=null) { Identify.Map=Map1; response=Identify.Identify(m_queryString);
 } } break; default: break;
 } return response;
}
这是照着网上的ArcGIS server自带例子做的，一样的代码，目的是实现MapIdentify功能，自定义Tool以及TaskResults应用，可是运行时提示最后一行出现类、结构或接口成员声明中的“return”无效以及同样的“；”无效，这是为什么呢？本人刚入手做，希望有做过类似例子的高手指点一下吧！谢谢啦

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求助高手！ 类 结构或接口成员中声明的无效！急急！

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求助高手！类结构或接口成员中声明的无效！急急！