private void writePx(MapWinGIS.Grid gr, MapWinGIS.GridDataType grType,
GridPixel pix, object val, MapWinGIS.ICallback cback)
{
switch (grType)
{
case GridDataType.ShortDataType:
short v1 = Convert.ToInt16(val);
gr.set_Value(pix.col, pix.row, v1);
break;
case GridDataType.LongDataType:
int v2 = Convert.ToInt32(val);
gr.set_Value(pix.col, pix.row, v2);
break;
case GridDataType.FloatDataType:
float v3 = Convert.ToSingle(val);
gr.set_Value(pix.col, pix.row, v3);
break;
case GridDataType.DoubleDataType:
double v4 = Convert.ToDouble(val);
gr.set_Value(pix.col, pix.row, v4);
break;
default:
reportError("the grid data type " + grType.ToString() + "is not supported.", cback);
break;
}
}
private bool Multipoint2Grid(MapWinGIS.Shapefile MultipointSf, int FldID, MapWinGIS.Grid Newgrd,
MapWinGIS.GridHeader header, MapWinGIS.GridDataType grType, MapWinGIS.ICallback cback)
{
//count the number of shapes
int s, p;
MapWinGIS.Shape shp;
MapWinGIS.Point pt;
ArrayList pixels = new ArrayList();
object val;
GridPixel px;
int nShps = MultipointSf.NumShapes;
int nPts = 0;
int perc = 1;
int shpsPerc = NumPercentShapes(perc, nShps); //percent of progress
for (s = 0; s < nShps; ++s)
{
//get the shape
shp = MultipointSf.get_Shape(s);
//exclude shapes which are completely outside of the grid extents
if (!IsGridContainsShape(shp, header))
{
continue;
}
//get the shape's value
val = GetCellValue(MultipointSf, FldID, s, header.NodataValue);
nPts = shp.numPoints;
for (p = 0; p < nPts; ++p)
{
//write pixel values
pt = shp.get_Point(p);
Newgrd.ProjToCell(pt.x, pt.y, out px.col, out px.row);
pixels.Add(px);
writePxList(Newgrd, grType, pixels, val, cback);
}
//report the progress
if (s >= shpsPerc)
{
reportProgress(shpsPerc, nShps, "shapefile to grid", cback);
perc = (int)((s * 100) / nShps);
shpsPerc = NumPercentShapes(perc + 1, nShps);
}
}
return(true);
}
/// <summary>
/// convert point shapefile to grid
/// </summary>
private bool Point2Grid(MapWinGIS.Shapefile PointSf, int FldID, MapWinGIS.Grid Newgrd,
MapWinGIS.GridHeader header, MapWinGIS.GridDataType grType, MapWinGIS.ICallback cback)
{
//count the number of shapes
int s;
MapWinGIS.Shape shp;
MapWinGIS.Point pt = new MapWinGIS.Point();
object val;
GridPixel px;
int nShps = PointSf.NumShapes;
int perc = 1;
int shpsPerc = NumPercentShapes(perc, nShps); //percent of progress
for (s = 0; s < nShps; ++s)
{
//get the point
shp = PointSf.get_Shape(s);
//exclude shapes which are completely outside of the grid extents
if (!IsGridContainsShape(shp, header))
{
continue;
}
if (shp.numPoints > 0)
{
pt = shp.get_Point(0);
if (pt != null)
{
//return the shape's value and write the pixel
val = GetCellValue(PointSf, FldID, s, header.NodataValue);
Newgrd.ProjToCell(pt.x, pt.y, out px.col, out px.row);
writePx(Newgrd, grType, px, val, cback);
}
}
//report the progress
if (s >= shpsPerc)
{
perc = (int)((s * 100) / nShps);
shpsPerc = NumPercentShapes(perc + 1, nShps);
reportProgress(shpsPerc, nShps, "shapefile to grid", cback);
}
}
return(true);
}
/// <summary>
/// writes the pixel values from arrayList to grid
/// </summary>
/// <param name="gr"></param>
/// <param name="pxList"></param>
/// <param name="val"></param>
/// <param name="cback"></param>
private void writePxList(MapWinGIS.Grid gr, MapWinGIS.GridDataType grType,
System.Collections.ArrayList pxList, object val, MapWinGIS.ICallback cback)
{
switch (grType)
{
case GridDataType.ShortDataType:
short v1 = Convert.ToInt16(val);
foreach (GridPixel pix in pxList)
{
gr.set_Value(pix.col, pix.row, v1);
}
break;
case GridDataType.LongDataType:
int v2 = Convert.ToInt32(val);
foreach (GridPixel pix in pxList)
{
gr.set_Value(pix.col, pix.row, v2);
}
break;
case GridDataType.FloatDataType:
float v3 = Convert.ToSingle(val);
foreach (GridPixel pix in pxList)
{
gr.set_Value(pix.col, pix.row, v3);
}
break;
case GridDataType.DoubleDataType:
double v4 = Convert.ToDouble(val);
foreach (GridPixel pix in pxList)
{
gr.set_Value(pix.col, pix.row, v4);
}
break;
default:
reportError("the grid data type " + grType.ToString() + "is not supported.", cback);
break;
}
pxList.Clear();
}
/// <summary>
/// 'Copyright (C) 2008 Enrico Antonio Chiaradia, UNIMI
///'This program is free software; you can redistribute it and/or
///'modify it under the terms of the GNU General Public License
///'version 2, 1991 as published by the Free Software Foundation.
///'This program is distributed in the hope that it will be useful,
///'but WITHOUT ANY WARRANTY; without even the implied warranty of
///'MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
///'GNU General Public License for more details.
///'A copy of the full GNU General Public License is available at:
///'http://www.gnu.org/copyleft/gpl.html
///'or from:
///'The Free Software Foundation, Inc., 59 Temple Place - Suite 330,
///'Boston, MA 02111-1307, USA.
///'If you wish to use or incorporate this program (or parts of it) into
///'other software that does not meet the GNU General Public License
///'conditions contact the author to request permission.
///'If you have any question or suggestion, please contact the author.
///'Enrico A. Chiaradia
///'University of Milan
///'Ist. di Idraulica Agraria
///'via Celoria 2
///'20133, Milan, Italy
///'email: [email protected]
/// </summary>
/// <param name="sfPath">the name of the shapefile</param>
/// <param name="resultGridPath">the name of the new grid</param>
/// <param name="gridFileType">file type of the new grid</param>
/// <param name="gridDataType">data format of the new grid</param>
/// <param name="sfValueField">the name of the field that contains data</param>
/// <param name="resultGridHeader">contains information about dimension of the new grid</param>
/// <param name="callback">(optional) reports progress and error messages</param>
/// <returns></returns>
public bool ShapefileToGrid2(string SfNm, string GrdName,
MapWinGIS.GridFileType GrdFileType, MapWinGIS.GridDataType GrdDataType,
string Fldname, MapWinGIS.GridHeader GrdHd,
MapWinGIS.ICallback cback)
{
int i;
bool flg;
string projStr;
//open the shapefile
MapWinGIS.Shapefile MySf = new MapWinGIS.Shapefile();
flg = MySf.Open(SfNm, cback);
if (flg == false)
{
reportError("ERROR in opening shapefile: " + SfNm, cback);
MySf.Close();
return(false);
}
//get the handle for the field
MapWinGIS.Field field;
int FldId = -1;
int LayFldNum = MySf.NumFields;
i = 0;
for (i = 0; i < LayFldNum; ++i)
{
field = MySf.get_Field(i);
if (field.Name.ToLower() == Fldname.ToLower())
{
FldId = i;
break;
}
}
if (FldId < 0)
{
reportError("The shapefile " + SfNm + " doesn't have a field " + Fldname, cback);
MySf.Close();
return(false);
}
//copy shapefile projection
projStr = MySf.Projection;
if (!MapWinUtility.Strings.IsEmpty(projStr))
{
GrdHd.Projection = projStr;
}
//create a new grid and a new gridheader
MapWinGIS.Grid NewGrd = new MapWinGIS.Grid();
flg = NewGrd.CreateNew(GrdName, GrdHd, GrdDataType, GrdHd.NodataValue, false, GrdFileType, cback);
if (flg == false)
{
reportError("ERROR in grid initialization: " + GrdName, cback);
NewGrd.Close();
MySf.Close();
}
//verify the type of shapefile and call rasterization function
MapWinGIS.ShpfileType SfType = new MapWinGIS.ShpfileType();
SfType = MySf.ShapefileType;
switch (SfType)
{
case ShpfileType.SHP_POLYGON:
case ShpfileType.SHP_POLYGONM:
case ShpfileType.SHP_POLYGONZ:
flg = Poly2Grid(MySf, FldId, NewGrd, GrdHd, GrdDataType, cback);
break;
case ShpfileType.SHP_POLYLINE:
case ShpfileType.SHP_POLYLINEM:
case ShpfileType.SHP_POLYLINEZ:
flg = Line2Grid(MySf, FldId, NewGrd, GrdHd, GrdDataType, cback);
break;
case ShpfileType.SHP_POINT:
case ShpfileType.SHP_POINTM:
case ShpfileType.SHP_POINTZ:
flg = Point2Grid(MySf, FldId, NewGrd, GrdHd, GrdDataType, cback);
break;
case ShpfileType.SHP_MULTIPOINT:
case ShpfileType.SHP_MULTIPOINTM:
case ShpfileType.SHP_MULTIPOINTZ:
flg = Multipoint2Grid(MySf, FldId, NewGrd, GrdHd, GrdDataType, cback);
break;
default:
reportError("The shapefile type " + SfType.ToString() + "is not supported.", cback);
NewGrd.Close();
MySf.Close();
flg = false;
break;
}
//save and close the grid, close shapefile
NewGrd.Save(GrdName, GrdFileType, cback);
NewGrd.Close();
MySf.Close();
return(flg);
}
/// <summary>
/// converts a Line shapefile to grid using Bresenham algorithm
/// </summary>
/// <param name="PolySf">Polygon shapefile object</param>
/// <param name="FldID">Field index</param>
/// <param name="Newgrd">New grid object</param>
/// <param name="header">Grid header</param>
/// <param name="nodatavalue"></param>
/// <param name="cback">optional, for reporting progress</param>
/// <returns>true if successful</returns>
private bool Line2Grid(MapWinGIS.Shapefile LineSf, int FldID, MapWinGIS.Grid Newgrd,
MapWinGIS.GridHeader header, MapWinGIS.GridDataType grType, MapWinGIS.ICallback cback)
{
int numParts, numPoints;
int curPartStart, curPartEnd, vertexCol, vertexRow, lastCol, lastRow;
int nShps = LineSf.NumShapes;
int perc = 1;
int shpsPerc = NumPercentShapes(perc, nShps); //percent of progress
int s = 0; //shape number
int p = 0; //part number
int k = 0; //point number
MapWinGIS.Shape LineShp = new MapWinGIS.Shape();
MapWinGIS.Point curPoint;
//Rasterization ras = new Rasterization(); //rasterization class, contains the code of
//lineToGrid methods independent on MapWinGIS functions
ArrayList vertices = new ArrayList(); //list of line vertex points
ArrayList pixels = new ArrayList(); //list of calculated pixels on the line
GridPixel px;
object val; //the shape's value
for (s = 0; s < nShps; ++s)
{
LineShp = LineSf.get_Shape(s);
numParts = LineShp.NumParts;
numPoints = LineShp.numPoints;
//exclude shapes which are completely outside of the grid extents
if (!IsGridContainsShape(LineShp, header))
{
continue;
}
//get the shape's value
val = GetCellValue(LineSf, FldID, s, header.NodataValue);
//process each part of the polyline
curPartStart = 0;
for (p = 0; p < numParts; ++p)
{
vertices.Clear();
pixels.Clear();
curPartStart = LineShp.get_Part(p);
// check for multi-part lines
if (p < numParts - 1)
{
curPartEnd = LineShp.get_Part(p + 1) - 1;
}
else
{
curPartEnd = numPoints - 1;
}
//go to next part if there's zero points
if (numPoints <= 0)
{
continue;
}
// add all points of current part to rasterization list
// always add the first point of the part (convert its coordinates to
// grid row and column)
curPoint = LineShp.get_Point(curPartStart);
Newgrd.ProjToCell(curPoint.x, curPoint.y,
out vertexCol, out vertexRow);
px.col = vertexCol;
px.row = vertexRow;
vertices.Add(px);
lastCol = vertexCol; lastRow = vertexRow;
// add all other points with different grid coordinates
for (k = curPartStart + 1; k <= curPartEnd; ++k)
{
// (check if it has a different row or column than the previous point)
curPoint = LineShp.get_Point(k);
Newgrd.ProjToCell(curPoint.x, curPoint.y,
out vertexCol, out vertexRow);
if (vertexCol != lastCol || vertexRow != lastRow)
{
px.col = vertexCol;
px.row = vertexRow;
vertices.Add(px);
lastCol = vertexCol;
lastRow = vertexRow;
}
}
// convert the polyline and write pixels to grid
LineBresenham(vertices, pixels);
writePxList(Newgrd, grType, pixels, val, cback);
}
//report the progress
if (s >= shpsPerc)
{
reportProgress(shpsPerc, nShps, "shapefile to grid", cback);
perc = (int)((s * 100) / nShps);
shpsPerc = NumPercentShapes(perc + 1, nShps);
}
}
return(true);
}
/// <summary>
/// This function converts a polygon shapefile to grid. It implements the line-scan algorithm.
/// <param name="PolySf">The polygon shapefile</param>
/// <param name="FldID">The field index</param>
/// <param name="Newgrd">File name of the new grid</param>
/// <param name="header">Header object of the new grid</param>
/// <param name="writePxDeleg">Delegate function for writing the grid pixels</param>
/// <param name="nodatavalue">'no data' value</param>
/// <param name="cback">can be used to report progress (optional)</param>
/// <returns>true if successful</returns>
//
// AUTHOR NAME: Enrico A. Chiaradia
// FROM: University of Milan (Italy)
// e.mail: [email protected]
//
// For details about the line-scan algorithm,
// please refer to http://www.profc.udec.cl/~gabriel/tutoriales/giswb/vol1/cp3/cp3-6.htm
//
// for each shape in PolySf
// 0) get the shape value (in the shapefile table)
// 1) load all the borders in a matrix composed by x(startpoint), x(endpoint), slope and share
// 2) define x of first scan line
// for each scan lines
// 3) calculate intersections with polygon border
// 4) sort intersections from lower Y to the higther
// 5) convert line space between two consecutive intersection to raster
private bool Poly2Grid(MapWinGIS.Shapefile PolySf, int FldID, MapWinGIS.Grid Newgrd,
MapWinGIS.GridHeader header, MapWinGIS.GridDataType grType,
MapWinGIS.ICallback cback)
{
double xMin, xMax;
double x0, x1, x2, y0, y1, y2, m, q;
int nShps, nVs, i, s, nP, p, tempn, v, b;
object val;
bool flg;
bord brd; //struct to keep a border
System.Collections.ArrayList bordi2; //list of borders
int perc = 1; //percent shapes done
int shpsPerc;
MapWinGIS.Shape PolyShp; //the polygon shape
//count the number of shapes
nShps = PolySf.NumShapes;
shpsPerc = NumPercentShapes(perc, nShps); //percent of progress
for (s = 0; s < nShps; ++s)
{
//for each shape, determine the extent and the number of parts
i = 0;
PolyShp = PolySf.get_Shape(s);
nP = PolyShp.NumParts;
xMin = PolyShp.Extents.xMin;
//yMin = PolyShp.Extents.yMin;
xMax = PolyShp.Extents.xMax;
//yMax = PolyShp.Extents.yMax;
//exclude shapes which are completely outside of the grid extents
if (!IsGridContainsShape(PolyShp, header))
{
continue;
}
//return the shape's value
val = GetCellValue(PolySf, FldID, s, header.NodataValue);
//load polygon borders
nVs = PolyShp.numPoints - 1;
bordi2 = new System.Collections.ArrayList(nVs + 1);
b = -1;
tempn = 0;
for (p = 0; p < nP; ++p)
{
x0 = PolyShp.get_Point(tempn).x;
y0 = PolyShp.get_Point(tempn).y;
for (v = tempn; v < nVs; ++v)
{
x1 = PolyShp.get_Point(v).x;
x2 = PolyShp.get_Point(v + 1).x;
y1 = PolyShp.get_Point(v).y;
y2 = PolyShp.get_Point(v + 1).y;
if (x1 != x2) // no vertical lines
{
m = (y2 - y1) / (x2 - x1);
q = y1 - (m * x1);
//add border to the list
b = b + 1;
brd = new bord();
brd.x1 = x1;
brd.x2 = x2;
brd.m = m;
brd.q = q;
bordi2.Add(brd);
}
//in case of multi-parts polygon
if ((x2 == x0) && (y2 == y0))
{
tempn = v + 2;
break;
}
} //Next v
} // next p
//define the first line-scan
double xstart;
// 20 nov 07 added by Enrico A. Chiaradia
//necessary if grid extentions differ from shapefile extentions
if (xMin >= header.XllCenter)
{
xstart = FirstLineXY(xMin, header.XllCenter, header.dX, 1);
}
else
{
xstart = FirstLineXY(xMin, header.XllCenter, header.dX, -1);
}
// the list of intersection y-values
System.Collections.ArrayList y_int = new System.Collections.ArrayList();
System.Collections.ArrayList pixels = new System.Collections.ArrayList();
do
{
flg = Interseca(bordi2, y_int, xstart);
flg = SortArray(y_int);
flg = ScanLine2(y_int, xstart, ref pixels, ref Newgrd, header, val, cback);
xstart = xstart + header.dX;
}while (xstart <= xMax);
writePxList(Newgrd, grType, pixels, val, cback);
//report the progress
if (s >= shpsPerc)
{
reportProgress(shpsPerc, nShps, "shapefile to grid", cback);
perc = (int)((s * 100) / nShps);
shpsPerc = NumPercentShapes(perc + 1, nShps);
}
} // next shape
reportProgress(100, 100, "shapefile to grid", cback); //100 % shapes done
return(true);
}
private void DisplaySelectedValues(double SelValue)
{
if (SkipDisplayValues)
{
return;
}
if (m_Extents == null || m_Grid == null)
{
return;
}
try
{
int endRow = 0, endCol = 0;
int startRow = 0, startCol = 0;
double x = 0, y = 0;
double cellValue = 0;
//find the begining and end cells
m_Grid.ProjToCell(m_Extents.xMin, m_Extents.yMax, out startCol, out startRow);
m_Grid.ProjToCell(m_Extents.xMax, m_Extents.yMin, out endCol, out endRow);
//get the data type of the grid
MapWinGIS.GridDataType type = m_Grid.DataType;
//creat a drawing suface
if (m_hDraw == -1)
{
m_hDraw = m_parent.m_MapWin.View.Draw.NewDrawing(MapWinGIS.tkDrawReferenceList.dlSpatiallyReferencedList);
}
else
{
m_parent.m_MapWin.View.Draw.ClearDrawing(m_hDraw);
m_hDraw = m_parent.m_MapWin.View.Draw.NewDrawing(MapWinGIS.tkDrawReferenceList.dlSpatiallyReferencedList);
}
//display all the selected values
for (int row = startRow; row <= endRow; row++)
{
for (int col = startCol; col <= endCol; col++)
{
if (type == MapWinGIS.GridDataType.LongDataType)
{
cellValue = int.Parse(m_Grid.get_Value(col, row).ToString());
}
else if (type == MapWinGIS.GridDataType.DoubleDataType)
{
cellValue = double.Parse(m_Grid.get_Value(col, row).ToString());
}
else if (type == MapWinGIS.GridDataType.FloatDataType)
{
cellValue = float.Parse(m_Grid.get_Value(col, row).ToString());
}
else if (type == MapWinGIS.GridDataType.ShortDataType)
{
cellValue = short.Parse(m_Grid.get_Value(col, row).ToString());
}
if (Math.Round(SelValue, 8) == Math.Round(cellValue, 8))
{
m_Grid.CellToProj(col, row, out x, out y);
m_parent.m_MapWin.View.Draw.DrawPoint(x, y, 3, RED);
}
}
}
}
catch (System.Exception ex)
{
ShowErrorBox("DisplaySelectedValues()", ex.Message);
}
}
private void PopulateLV(ref System.Data.DataSet dataset, Grid grid, MapWinGIS.Extents extents, int LyrHandle)
{
int maxCapacity = grid.Header.NumberCols * grid.Header.NumberRows;
System.Collections.Hashtable table = new Hashtable();
int endRow = 0, endCol = 0;
int startRow = 0, startCol = 0;
double cellValue = 0;
GridValue gridValue;
try
{
//find the begining and end cells
grid.ProjToCell(extents.xMin, extents.yMax, out startCol, out startRow);
grid.ProjToCell(extents.xMax, extents.yMin, out endCol, out endRow);
MapWinGIS.GridDataType type = grid.DataType;
// Ensure the same datatype is used between noDataValue and Cell Value to prevent missing
// digits on scientific notation
double noDataValue = 0;
if (type == MapWinGIS.GridDataType.LongDataType)
{
noDataValue = (double)Math.Round(double.Parse(grid.Header.NodataValue.ToString()));
}
else if (type == MapWinGIS.GridDataType.DoubleDataType)
{
noDataValue = double.Parse(grid.Header.NodataValue.ToString());
}
else if (type == MapWinGIS.GridDataType.FloatDataType)
{
noDataValue = (double)float.Parse(grid.Header.NodataValue.ToString());
}
else if (type == MapWinGIS.GridDataType.ShortDataType)
{
noDataValue = (double)short.Parse(grid.Header.NodataValue.ToString());
}
bool WarnedBefore = false;
//find all the values and the count
for (int row = startRow; row <= endRow; row++)
{
for (int col = startCol; col <= endCol; col++)
{
try
{
//System.Diagnostics.Debug.WriteLine("Col: " + col + " Row: " + row);
//System.Diagnostics.Debug.WriteLine(grid.get_Value(col,row).ToString());
if (type == MapWinGIS.GridDataType.LongDataType)
{
cellValue = long.Parse(grid.get_Value(col, row).ToString());
}
else if (type == MapWinGIS.GridDataType.DoubleDataType)
{
cellValue = double.Parse(grid.get_Value(col, row).ToString());
}
else if (type == MapWinGIS.GridDataType.FloatDataType)
{
cellValue = float.Parse(grid.get_Value(col, row).ToString());
}
else if (type == MapWinGIS.GridDataType.ShortDataType)
{
cellValue = short.Parse(grid.get_Value(col, row).ToString());
}
//ignore the value if it is a no data value
// Assume that if the value and the nodata value are both very near min long, it's nodata (float rounding errors)
if (cellValue != noDataValue && !(cellValue < -2147483640 && noDataValue < -2147483640))
{
//if the table contains the value then increment the count
if (table.Contains(cellValue))
{
gridValue = (GridValue)table[cellValue];
gridValue.count++;
table[cellValue] = gridValue;
}
//add a new value to the table.
// Cap to maximum size of unique values
else if (table.Count < 10000)
{
gridValue = new GridValue();
gridValue.cellValue = cellValue;
gridValue.count = 1;
table.Add(cellValue, gridValue);
}
else
{
if (!WarnedBefore)
{
MapWinUtility.Logger.Message("Warning: Exceeded maximum cap of 10,000 unique values in the table. Some values may be ommitted.", "Exceeded Max Unique Values", MessageBoxButtons.OK, MessageBoxIcon.Information, DialogResult.OK);
WarnedBefore = true;
}
}
}
}
catch (FormatException)
{
// Probably a bad nodata value.
}
}
}
if (table.Count > 0)
{
IDictionaryEnumerator myEnumerator = table.GetEnumerator();
//itialize the high and low values
myEnumerator.MoveNext();
double high = ((GridValue)myEnumerator.Value).cellValue;
double low = ((GridValue)myEnumerator.Value).cellValue;
myEnumerator.Reset();
//move to the next value in the hashtable
while (myEnumerator.MoveNext())
{
gridValue = (GridValue)myEnumerator.Value;
string s = gridValue.cellValue.ToString();
double ds = 0;
double.TryParse(s, out ds);
if (m_parent.m_MapWin.Layers[LyrHandle].ColoringScheme != null)
{
MapWinGIS.GridColorScheme sch = (MapWinGIS.GridColorScheme)m_parent.m_MapWin.Layers[LyrHandle].ColoringScheme;
for (int z = 0; z < sch.NumBreaks; z++)
{
MapWinGIS.GridColorBreak brk = sch.get_Break(z);
double compareStart = 0;
double compareEnd = 0;
if (double.TryParse(brk.HighValue.ToString(), out compareEnd) && double.TryParse(brk.LowValue.ToString(), out compareStart))
{
if (compareEnd >= ds && compareStart <= ds && brk.Caption != "")
{
s += " (" + brk.Caption + ")";
break;
}
}
else
{
if (brk.HighValue.ToString() == s && brk.LowValue.ToString() == s && brk.Caption != "")
{
s += " (" + brk.Caption + ")";
break;
}
}
}
}
dataset.Tables[0].Rows.Add(s, gridValue.count.ToString());
//keep track of the high and low values in the hashtable
if (gridValue.cellValue > high)
{
high = gridValue.cellValue;
}
if (gridValue.cellValue < low)
{
low = gridValue.cellValue;
}
}
lbHighValue.Text = high.ToString();
lbLowValue.Text = low.ToString();
}
//the region that was selected was out of the grid bounds
else
{
lbHighValue.Text = "No Data";
lbLowValue.Text = "No Data";
}
}
catch (System.Exception ex)
{
ShowErrorBox("PopulateLV()", ex.Message);
}
}