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Large excel files

Hi, I was wondering if it was possible to load only part of a worksheet? We have an issue in production with some customers who have very large excel files causing issues.

Hi,

Yes, you can partially load a workbook with your selected worksheet and leave others.

Please download and use the latest version:
Aspose.Cells
for .NET v7.3.2.3


Please try the following code with the sample xlsx file attached by me.

a) - If you just want to load data of one worksheet, please try the following code:

C#


LoadOptions loadOptions = new LoadOptions(LoadFormat.Xlsx);
LoadDataOption dataOption = new LoadDataOption();
dataOption.SheetIndexes = new int[] { 0 };
dataOption.ImportFormula = true;
loadOptions.LoadDataOnly = true;

//Specify the LoadDataOption
loadOptions.LoadDataOptions = dataOption;

//Create a Workbook object and opening the file from its path
Workbook wb = new Workbook(Constants.sourcePath + “Source.xlsx”, loadOptions);


Worksheet sheet1 = wb.Worksheets[0];
Worksheet sheet2 = wb.Worksheets[1];
Worksheet sheet3 = wb.Worksheets[2];


Cell cellA1OfSheet1 = sheet1.Cells[“A1”];
Cell cellA1OfSheet2 = sheet2.Cells[“A1”];
Cell cellA1OfSheet3 = sheet3.Cells[“A1”];

Debug.Assert(cellA1OfSheet2.Type == CellValueType.IsNull, “This message should not appear”);

Debug.Assert(cellA1OfSheet3.Type == CellValueType.IsNull, “This message should not appear”);

VB.NET
Dim filePath As String = "F:\Shak-Data-RW\Downloads\source.xlsx"


Dim loadOptions As LoadOptions = New LoadOptions(LoadFormat.Xlsx)

Dim dataOption As LoadDataOption = New LoadDataOption()

dataOption.SheetIndexes = New Integer() {0}

dataOption.ImportFormula = True

loadOptions.LoadDataOnly = True


'Specify the LoadDataOption

loadOptions.LoadDataOptions = dataOption


'Create a Workbook object and opening the file from its path

Dim wb As Workbook = New Workbook(filePath, loadOptions)


Dim sheet1 As Worksheet = wb.Worksheets(0)

Dim sheet2 As Worksheet = wb.Worksheets(1)

Dim sheet3 As Worksheet = wb.Worksheets(2)


Dim cellA1OfSheet1 As Cell = sheet1.Cells(“A1”)

Dim cellA1OfSheet2 As Cell = sheet2.Cells(“A1”)

Dim cellA1OfSheet3 As Cell = sheet3.Cells(“A1”)


Debug.Assert(cellA1OfSheet2.Type = CellValueType.IsNull, “This message should not appear”)

Debug.Assert(cellA1OfSheet3.Type = CellValueType.IsNull, “This message should not appear”)


b) - If you just want to get the all sheets’ name, please use the following code:

C#
dataOption.SheetIndexes = new int[] { };

Thanks for the prompt reply. This might help us but is it possible to only load a partial worksheet or do you still need to load the entire sheet?

Hi,


I am afraid, there is no way to load a worksheet partially, either you have to load the entire sheet or not.

Thanks,

That's what I figured but thought I'd check. Thanks again for the prompt replies!

-Eric

Hi,

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