public void Compute(IRasterDataProvider dataProvider, string expression, IRasterBand dstRasterBand, Action <int, string> progressTracker)
{
try
{
IBandMathExecutor exe = ClassRuntimeGenerator.GenerateBandMathExecutor(GetDataType(dataProvider.DataType), GetDataType(dstRasterBand.DataType));
exe.Compute(dataProvider, expression, dstRasterBand, progressTracker);
}
catch (ArgumentOutOfRangeException)
{
throw new ArgumentOutOfRangeException("波段计算公式引用的波段序号超出有效范围！");
}
}
public void SetExpression(string expression)
{
if (string.IsNullOrWhiteSpace(expression))
{
return;
}
lvBandVars.Tag = expression;
txtExpression.Text = expression;
int[] bandNos;
ClassRuntimeGenerator.GetOperatorString(expression, out bandNos);
if (bandNos != null && bandNos.Length > 0)
{
foreach (int bNo in bandNos)
{
lvBandVars.Items.Add(new BandVarItem("B" + bNo.ToString()));
}
}
}