/// <summary>
/// Sets the output projection for the transform to the one chosen here.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void comboBoxCoordSys_SelectedIndexChanged(object sender, EventArgs e)
{
try
{
ISpatialReference sr = null;
ISpatialReferenceFactory3 srFactory = new SpatialReferenceEnvironmentClass();
if (comboBoxCoordSys.SelectedIndex == 4)
{
if (_map != null && _map.SpatialReference != null)
{
sr = _map.SpatialReference;
labelSR.Text = sr.Name;
}
else
{
labelSR.Text = "";
}
buttonSR.Enabled = true;
_transform.SetGeoTransform(null);
}
else
{
if (comboBoxCoordSys.SelectedIndex == 0)
{
sr = srFactory.CreateGeographicCoordinateSystem((int)esriSRGeoCSType.esriSRGeoCS_WGS1984);
_transform.SetGeoTransform(null);
}
else
{
if (comboBoxCoordSys.SelectedIndex == 1)
{
sr = srFactory.CreateProjectedCoordinateSystem((int)esriSRProjCSType.esriSRProjCS_NAD1983UTM_10N);
}
else if (comboBoxCoordSys.SelectedIndex == 2)
{
sr = srFactory.CreateProjectedCoordinateSystem((int)esriSRProjCSType.esriSRProjCS_NAD1983UTM_11N);
}
else if (comboBoxCoordSys.SelectedIndex == 3)
{
sr = srFactory.CreateProjectedCoordinateSystem((int)esriSRProjCSType.esriSRProjCS_NAD1983UTM_12N);
}
IGeoTransformation trans = null;
trans = (IGeoTransformation)srFactory.CreateGeoTransformation(
(int)esriSRGeoTransformationType.esriSRGeoTransformation_NAD1983_To_WGS1984_1);
_transform.SetGeoTransform(trans);
}
labelSR.Text = "";
buttonSR.Enabled = false;
}
_transform.SetSpatialReference(sr);
if ((_map.SpatialReference == null) || !((IClone)_map.SpatialReference).IsEqual((IClone)sr))
{
_map.SpatialReference = sr;
ArcMap.Document.ActiveView.Refresh();
}
FillDatumTransform();
EnableSelectInputs();
}
catch (Exception ex)
{
ShowError(ex.Message);
}
}