ArcGIS Server点击查询
（1）创建新类，类名为 IdentifyPopTool ，并实现IMapServerToolAction接口
public class IdentifyPopUpTool : IMapServerToolAction
{
#region IMapServerToolAction Members
void IMapServerToolAction.ServerAction(ToolEventArgs args)
{
ESRI.ArcGIS.ADF.Web.UI.WebControls.Map map = (ESRI.ArcGIS.ADF.Web.UI.WebControls.Map)args.Control;
PointEventArgs pea = (PointEventArgs)args;
System.Drawing.Point peanut = pea.ScreenPoint;
ESRI.ArcGIS.ADF.Web.Geometry.Point point = ESRI.ArcGIS.ADF.Web.Geometry.Point.ToMapPoint(peanut.X, peanut.Y, map.Extent, (int)map.Width.Value, (int)map.Height.Value);
System.Data.DataSet dataset = new System.Data.DataSet();
string sourcelayername = "City";
IEnumerable func_enum = map.GetFunctionalities();
//如果查询结果用TaskResult、GridResullt等窗口显示时，Server会自动产生一个GraphicsLayer，所以需要遍历Functionality，以获取相应IGISFunctionality进行查询
foreach (ESRI.ArcGIS.ADF.Web.DataSources.IGISFunctionality gisfunctionality in func_enum)
{
ESRI.ArcGIS.ADF.Web.DataSources.IGISResource gisresource = gisfunctionality.Resource;
if (gisresource is ESRI.ArcGIS.ADF.Web.DataSources.ArcGISServer.MapResourceLocal)
{
bool supportquery = gisresource.SupportsFunctionality(typeof(ESRI.ArcGIS.ADF.Web.DataSources.IQueryFunctionality));
if (supportquery)
{
ESRI.ArcGIS.ADF.Web.DataSources.IQueryFunctionality qfunc;
qfunc = (ESRI.ArcGIS.ADF.Web.DataSources.IQueryFunctionality)gisresource.CreateFunctionality(typeof(ESRI.ArcGIS.ADF.Web.DataSources.IQueryFunctionality), null);
string[] lids;
string[] lnames;
qfunc.GetQueryableLayers(null, out lids, out lnames);
int layer_index = 0;
for (int i = 0; i < lnames.Length; i++) {
if (lnames[i] == sourcelayername) {
if (lids[i] is string) {
if (!int.TryParse((string)lids[i], out layer_index))
layer_index = i;
}
else {
layer_index = i;
}
break;
}
}
string[] lids1 = new string[1];
lids1[0] = layer_index.ToString();
System.Data.DataTable[] qdatatable = null;
qdatatable = qfunc.Identify(null, point, 3, ESRI.ArcGIS.ADF.Web.IdentifyOption.TopMostLayer, lids1); //查询特定层
if (qdatatable == null)
break;
System.Data.DataTable dtable = qdatatable[0];
string strID = (string)dtable.Rows[0]["XMBH"];
string strName = (string)dtable.Rows[0]["XMMC"];
CallbackResult cr2 = new CallbackResult(null, null, "javascript", "showDetail('" + strID + "','" + strName + "','" + peanut.X.ToString() + "','" + peanut.Y.ToString() + "');");
map.CallbackResults.Add(cr2);
}
}
}
object[] oa = new object[1];
string sa = "map.divObject.style.cursor = map.cursor";
oa[0] = sa;
CallbackResult cr1 = new CallbackResult(null, null, "javascript", oa);
map.CallbackResults.Add(cr1);
}
#endregion
}
（2）设置查询GIS工具按钮
<esri:Tool DefaultImage="~/Images/identify.png" JavaScriptFile="" ServerActionAssembly="App_Code" HoverImage="~/Images/identify_HOVER.gif" ServerActionClass="CustomToolLibrary.IdentifyPopUpTool" ClientAction="Point" ToolTip="点击查询要素" SelectedImage="~/Images/identify_ON.gif" Name="点击查询"></esri:Tool>
