/// <summary>
/// 获取坐标系详细参数信息
/// </summary>
/// <param name="spatialRef"></param>
/// <returns></returns>
public static string GetSpatialRefDetail(this ISpatialReference spatialRef)
{
if (spatialRef == null)
{
throw new Exception("坐标系(ISpatialReference)对象为Null，无法获取坐标系信息！");
}
string str = string.Empty;
try
{
if (spatialRef is IPRJSpatialReferenceGEN gen1)
{
gen1.ExportSpatialReferenceToPRJ(out str, out _);
}
else
{
IESRISpatialReferenceGEN gen2 = spatialRef as IESRISpatialReferenceGEN;
gen2.ExportToESRISpatialReference(out str, out _);
}
str = Environment.NewLine + str;
}
catch { }//在部分环境中无法将ISpatialReference转成IPRJSpatialReferenceGEN接口
return(spatialRef.Name + str);
}
public string ExportToESRISpatialReference(ISpatialReference spatialReference)
{
int bytes = 0;
string buffer = null;
ISpatialReference projectedCoordinateSystem = spatialReference;
IESRISpatialReferenceGEN parameterExport = projectedCoordinateSystem as IESRISpatialReferenceGEN;
parameterExport.ExportToESRISpatialReference(out buffer, out bytes);
return(buffer);
}
public override object EditValue(ITypeDescriptorContext context, IServiceProvider provider, object value)
{
//
if (context == null)
{
return(null);
}
if (context.Instance == null)
{
return(null);
}
if (provider == null)
{
return(null);
}
// Cannot handle multiple objects
if (context.Instance is object[])
{
return(null);
}
//
string wkt = null;
if (value != null)
{
wkt = value.ToString();
}
// Do ArcGIS Desktop Test
object dialog = null;
try {
dialog = new SpatialReferenceDialogClass();
}
catch { }
if (dialog == null)
{
MessageBox.Show(
"You do not have ArcGIS Desktop Installed",
Resources.TEXT_APPLICATION,
MessageBoxButtons.OK,
MessageBoxIcon.Exclamation,
MessageBoxDefaultButton.Button1,
MessageBoxOptions.DefaultDesktopOnly);
return(null);
}
// Variable to hold edited or created spatial reference
ISpatialReference spatialReferenceOut = null;
// Use DoModelCreate (if NULL) or DoModelEdit (if not NULL)
if (string.IsNullOrEmpty(wkt))
{
ISpatialReferenceDialog2 spatialReferenceDialog = (ISpatialReferenceDialog2)dialog;
spatialReferenceOut = spatialReferenceDialog.DoModalCreate(false, false, false, 0);
}
else
{
// Recreate ESRI Spatial Reference from String
ISpatialReferenceFactory3 spatialReferenceFactory = new SpatialReferenceEnvironmentClass();
ISpatialReferenceInfo spatialReferenceInfo = null;
int size;
spatialReferenceFactory.CreateESRISpatialReferenceInfo(wkt, out spatialReferenceInfo, out size);
ISpatialReference spatialReference = (ISpatialReference)spatialReferenceInfo;
// Display Spatial Reference Dialog
ISpatialReferenceDialog3 spatialReferenceDialog = (ISpatialReferenceDialog3)dialog;
spatialReferenceOut = spatialReferenceDialog.DoModalEdit3(spatialReference, true, 0);
}
// Exit if Output SpatialReference is NULL
if (spatialReferenceOut == null)
{
return(wkt);
}
// Convert ESRI Spatial Reference to a String
IESRISpatialReferenceGEN spatialReferenceGEN = (IESRISpatialReferenceGEN)spatialReferenceOut;
string projection;
int size2;
spatialReferenceGEN.ExportToESRISpatialReference(out projection, out size2);
if (string.IsNullOrEmpty(projection))
{
return(wkt);
}
// Return Result
return(projection);
}
