//删除FeatureClass中所有Feature
public static void DeleteFeature(IFeatureClass pFeatureClass, string condtion, out Exception Error)
{
Error = null;
if (pFeatureClass == null)
{
return;
}
IDataset dataset = pFeatureClass as IDataset;
IWorkspace workspace = dataset.Workspace;
IWorkspaceEdit workspaceEdit = workspace as IWorkspaceEdit;
workspaceEdit.DisableUndoRedo();
workspaceEdit.StartEditing(true);
workspaceEdit.StartEditOperation();
IFeatureCursor pFeatureCursor = null;
if (condtion != "")
{
IQueryFilter pFilter = new QueryFilterClass();
pFilter.WhereClause = condtion;
pFeatureCursor = pFeatureClass.Update(pFilter, false);
}
else
{
pFeatureCursor = pFeatureClass.Search(null, false);
}
IFeature pFeature = pFeatureCursor.NextFeature();
int count = 0;
try
{
while (pFeature != null)
{
// pFeatureCursor.DeleteFeature();
pFeature.Delete();
count++;
if (count == 500)
{
pFeatureCursor.Flush();
count = 0;
}
pFeature = pFeatureCursor.NextFeature();
}
if (count > 0)
{
pFeatureCursor.Flush();
}
}
catch (Exception ex)
{
Error = ex;
}
System.Runtime.InteropServices.Marshal.ReleaseComObject(pFeatureCursor);
workspaceEdit.StopEditOperation();
workspaceEdit.StopEditing(true);
}
public bool StartEditing(IWorkspace TheWorkspace, bool IsUnversioned) // Start EditSession + create EditOperation
{
bool IsFileBasedGDB =
(!(TheWorkspace.WorkspaceFactory.WorkspaceType == esriWorkspaceType.esriRemoteDatabaseWorkspace));
IWorkspaceEdit pWSEdit = (IWorkspaceEdit)TheWorkspace;
if (pWSEdit.IsBeingEdited())
{
MessageBox.Show("The workspace is being edited by another process.");
return(false);
}
if (!IsFileBasedGDB)
{
IMultiuserWorkspaceEdit pMUWSEdit = (IMultiuserWorkspaceEdit)TheWorkspace;
try
{
if (pMUWSEdit.SupportsMultiuserEditSessionMode(esriMultiuserEditSessionMode.esriMESMNonVersioned) && IsUnversioned)
{
pMUWSEdit.StartMultiuserEditing(esriMultiuserEditSessionMode.esriMESMNonVersioned);
}
else if (pMUWSEdit.SupportsMultiuserEditSessionMode(esriMultiuserEditSessionMode.esriMESMVersioned) && !IsUnversioned)
{
pMUWSEdit.StartMultiuserEditing(esriMultiuserEditSessionMode.esriMESMVersioned);
}
else
{
return(false);
}
}
catch (COMException ex)
{
MessageBox.Show(ex.Message + " " + Convert.ToString(ex.ErrorCode), "Start Editing");
return(false);
}
}
else
{
try
{
pWSEdit.StartEditing(false);
}
catch (COMException ex)
{
MessageBox.Show(ex.Message + " " + Convert.ToString(ex.ErrorCode), "Start Editing");
return(false);
}
}
pWSEdit.DisableUndoRedo();
try
{
pWSEdit.StartEditOperation();
}
catch
{
pWSEdit.StopEditing(false);
return(false);
}
return(true);
}
