private MapInfo.Styles.RasterStyle GetRasterStyle(Table table)
{
MapInfo.Styles.RasterStyle rasterStyle = null;
MIDataReader rdr = null;
string projectionlist = "MI_Style";
rdr = table.ExecuteReader(projectionlist);
string name;
string typename;
int n = rdr.FieldCount;
MapInfo.Styles.Style style = null;
if (rdr.Read())
{
for (int i = 0; i < rdr.FieldCount; i++)
{
name = rdr.GetName(i);
typename = rdr.GetDataTypeName(i);
if (typename == "MapInfo.Styles.Style")
{
style = rdr.GetStyle(i);
}
}
}
rdr.Close();
rdr.Dispose();
rdr = null;
if (style != null)
{
rasterStyle = style as RasterStyle;
}
return(rasterStyle);
}
// Gets RasterInfo from a given table.
// Each raster table has exactly one associated raster image, and thus only one record.
// Reading that record with a data reader, we can get
// a FeatureGeometry - a bounding rectangle,
// a Style - the Raster style,
// a key
// a RasterInfo object.
private MapInfo.Raster.RasterInfo GetRasterInfo(Table table)
{
MapInfo.Raster.RasterInfo rasterInfo = null;
MIDataReader rdr = null;
string projectionlist = "obj, MI_Key, MI_Raster, MI_Style";
rdr = table.ExecuteReader(projectionlist);
string name;
string typename;
int n = rdr.FieldCount;
MapInfo.Styles.Style style;
MapInfo.Geometry.FeatureGeometry featureGeometry;
MapInfo.Data.Key key;
if (rdr.Read())
{
for (int i = 0; i < rdr.FieldCount; i++)
{
name = rdr.GetName(i);
typename = rdr.GetDataTypeName(i);
if (typename == "MapInfo.Styles.Style")
{
style = rdr.GetStyle(i);
}
else if (typename == "MapInfo.Geometry.FeatureGeometry")
{
featureGeometry = rdr.GetFeatureGeometry(i);
}
else if (typename == "MapInfo.Data.Key")
{
key = rdr.GetKey(i);
}
else if (typename == "MapInfo.Raster.RasterInfo")
{
rasterInfo = rdr.GetRasterInfo(i);
}
}
}
rdr.Close();
rdr.Dispose();
rdr = null;
return(rasterInfo);
}
public void SelectAllIndivColumns()
{
MIDataReader rdr = null;
string projectionlist = "obj, MI_Key, MI_Grid, MI_Style";
rdr = _miTable.ExecuteReader(projectionlist);
string name;
string typename;
int n = rdr.FieldCount;
if(rdr.Read())
{
n = rdr.FieldCount;//shouldn't change
for(int i =0; i <n; i++)
{
name = rdr.GetName(i);
typename = rdr.GetDataTypeName(i);
if(typename == "MapInfo.Styles.Style")
{
_mStyle = rdr.GetStyle(i) as GridStyle;
}
else if(typename == "MapInfo.Geometry.FeatureGeometry")
{
_mObject = rdr.GetFeatureGeometry(i);
}
else if(typename == "MapInfo.Data.Key")
{
_mKey = rdr.GetKey(i);
}
else if (typename == "MapInfo.Raster.GridInfo")
{
_mGridInfo = rdr.GetGridInfo(i);
}
}
}
rdr.Close();
rdr.Dispose();
rdr = null;
}
private string DetermineRemoteGeomType(FeatureLayer layer)
{
MapInfo.Data.Table t = layer.Table;
MapInfo.Styles.Style style = null;
MIConnection con = null;
MICommand cmd = null;
MIDataReader dr = null;
try {
con = new MIConnection();
con.Open();
cmd = con.CreateCommand();
cmd.CommandText = "select mi_style from \"" + t.Alias + "\"";
cmd.CommandType = System.Data.CommandType.Text;
dr = cmd.ExecuteReader();
while (dr.Read())
{
if (!dr.IsDBNull(0))
{
style = dr.GetStyle(0);
break;
}
}
}
catch (MIException) {
// e.g. if there is no mi_style column
}
finally {
if (cmd != null)
{
cmd.Dispose();
cmd = null;
}
if (dr != null)
{
dr.Close();
}
if (con != null)
{
con.Close();
con = null;
}
}
if (style != null)
{
if (style is SimpleLineStyle)
{
return("lclayerline.bmp");
}
else if (style is SimpleInterior || style is AreaStyle)
{
return("lclayerregion.bmp");
}
else if (style is BasePointStyle)
{
return("lclayerpoint.bmp");
}
else
{
return("lclayer.bmp");
}
}
else
{
return(null);
}
}