Iterating through all the cells in Excel VBA or VSTO 2005

Question

I need to simply go through all the cells in a Excel Spreadsheet and check the values in the cells   The cells may contain text  numbers or be blank   I am not very familiar   comfortable working with the concept of  Range    Therefore  any sample codes would be greatly appreciated    I did try to google it  but the code snippets I found didn t quite do what I needed   Thank you

User · Answer

There are several methods to accomplish this, each of which has advantages and disadvantages; First and foremost, you're going to need to have an instance of a Worksheet object, Application.ActiveSheet works if you just want the one the user is looking at.

The Worksheet object has three properties that can be used to access cell data (Cells, Rows, Columns) and a method that can be used to obtain a block of cell data, (get_Range).

Ranges can be resized and such, but you may need to use the properties mentioned above to find out where the boundaries of your data are. The advantage to a Range becomes apparent when you are working with large amounts of data because VSTO add-ins are hosted outside the boundaries of the Excel application itself, so all calls to Excel have to be passed through a layer with overhead; obtaining a Range allows you to get/set all of the data you want in one call which can have huge performance benefits, but it requires you to use explicit details rather than iterating through each entry.

This MSDN forum post shows a VB.Net developer asking a question about getting the results of a Range as an array

User · Answer

If you re just looking at values of cells you can store the values in an array of variant type   It seems that getting the value of an element in an array can be much faster than interacting with Excel  so you can see some difference in performance using an array of all cell values compared to repeatedly getting single cells   Dim ValArray as Variant ValArray   Range  A1 IV   amp  Rows Count  Value   Then you can get a cell value just by checking ValArray  row   column

User · Answer

For a VB or C  app  one way to do this is by using Office Interop   This depends on which version of Excel you re working with   For Excel 2003  this MSDN article is a good place to start  Understanding the Excel Object Model from a Visual Studio 2005 Developer s Perspective   You ll basically need to do the following    Start the Excel application  Open the Excel workbook  Retrieve the worksheet from the workbook by name or index  Iterate through all the Cells in the worksheet which were retrieved as a range  Sample  untested  code excerpt below for the last step         Excel Range allCellsRng      string lowerRightCell    IV65536       allCellsRng   ws get Range  A1   lowerRightCell  Cells      foreach  Range cell in allCellsRng                if  null    cell Value2    isBlank cell Value2                          Do something                    else if  isText cell Value2                          Do something                    else if  isNumeric cell Value2                          Do something                    For Excel 2007  try this MSDN reference

User · Answer

If you only need to look at the cells that are in use you can use   sub IterateCells       For Each Cell in ActiveSheet UsedRange Cells        do some stuff    Next  End Sub   that will hit everything in the range from A1 to the last cell with data  the bottom right-most cell

User · Answer

For a VB or C  app  one way to do this is by using Office Interop   This depends on which version of Excel you re working with   For Excel 2003  this MSDN article is a good place to start  Understanding the Excel Object Model from a Visual Studio 2005 Developer s Perspective   You ll basically need to do the following    Start the Excel application  Open the Excel workbook  Retrieve the worksheet from the workbook by name or index  Iterate through all the Cells in the worksheet which were retrieved as a range  Sample  untested  code excerpt below for the last step         Excel Range allCellsRng      string lowerRightCell    IV65536       allCellsRng   ws get Range  A1   lowerRightCell  Cells      foreach  Range cell in allCellsRng                if  null    cell Value2    isBlank cell Value2                          Do something                    else if  isText cell Value2                          Do something                    else if  isNumeric cell Value2                          Do something                    For Excel 2007  try this MSDN reference

User · Answer

You basically can loop over a Range  Get a sheet  myWs    Worksheet MyWb Worksheets 1     Get the Range you re interested in If you really want to check every cell use Excel s limits      The Excel 2007  Big Grid  increases   the maximum number of rows per   worksheet from 65 536 to over 1   million  and the number of columns   from 256  IV  to 16 384  XFD     from here http   msdn microsoft com en-us library aa730921 aspx Office2007excelPerf BigGridIncreasedLimitsExcel   and then loop over the range          Range myBigRange   myWs get Range  A1    A256             string myValue           foreach Range myCell in myBigRange                         myValue   myCell Value2 ToString

User · Answer

You basically can loop over a Range  Get a sheet  myWs    Worksheet MyWb Worksheets 1     Get the Range you re interested in If you really want to check every cell use Excel s limits      The Excel 2007  Big Grid  increases   the maximum number of rows per   worksheet from 65 536 to over 1   million  and the number of columns   from 256  IV  to 16 384  XFD     from here http   msdn microsoft com en-us library aa730921 aspx Office2007excelPerf BigGridIncreasedLimitsExcel   and then loop over the range          Range myBigRange   myWs get Range  A1    A256             string myValue           foreach Range myCell in myBigRange                         myValue   myCell Value2 ToString

User · Answer

In Excel VBA  this function will give you the content of any cell in any worksheet   Function getCellContent Byref ws As Worksheet  ByVal rowindex As Integer  ByVal colindex As Integer  as String     getCellContent   CStr ws Cells rowindex  colindex   End Function   So if you want to check the value of cells  just put the function in a loop  give it the reference to the worksheet you want and the row index and column index of the cell  Row index and column index both start from 1  meaning that cell A1 will be ws Cells 1 1  and so on

User · Answer

There are several methods to accomplish this, each of which has advantages and disadvantages; First and foremost, you're going to need to have an instance of a Worksheet object, Application.ActiveSheet works if you just want the one the user is looking at.

The Worksheet object has three properties that can be used to access cell data (Cells, Rows, Columns) and a method that can be used to obtain a block of cell data, (get_Range).

Ranges can be resized and such, but you may need to use the properties mentioned above to find out where the boundaries of your data are. The advantage to a Range becomes apparent when you are working with large amounts of data because VSTO add-ins are hosted outside the boundaries of the Excel application itself, so all calls to Excel have to be passed through a layer with overhead; obtaining a Range allows you to get/set all of the data you want in one call which can have huge performance benefits, but it requires you to use explicit details rather than iterating through each entry.

This MSDN forum post shows a VB.Net developer asking a question about getting the results of a Range as an array

User · Answer

There are several methods to accomplish this, each of which has advantages and disadvantages; First and foremost, you're going to need to have an instance of a Worksheet object, Application.ActiveSheet works if you just want the one the user is looking at.

The Worksheet object has three properties that can be used to access cell data (Cells, Rows, Columns) and a method that can be used to obtain a block of cell data, (get_Range).

Ranges can be resized and such, but you may need to use the properties mentioned above to find out where the boundaries of your data are. The advantage to a Range becomes apparent when you are working with large amounts of data because VSTO add-ins are hosted outside the boundaries of the Excel application itself, so all calls to Excel have to be passed through a layer with overhead; obtaining a Range allows you to get/set all of the data you want in one call which can have huge performance benefits, but it requires you to use explicit details rather than iterating through each entry.

This MSDN forum post shows a VB.Net developer asking a question about getting the results of a Range as an array

User · Answer

You can use a For Each to iterate through all the cells in a defined range   Public Sub IterateThroughRange    Dim wb As Workbook Dim ws As Worksheet Dim rng As Range Dim cell As Range  Set wb   Application Workbooks 1  Set ws   wb Sheets 1  Set rng   ws Range  A1    C3    For Each cell In rng Cells     cell Value   cell Address Next cell  End Sub

User · Answer

For a VB or C  app  one way to do this is by using Office Interop   This depends on which version of Excel you re working with   For Excel 2003  this MSDN article is a good place to start  Understanding the Excel Object Model from a Visual Studio 2005 Developer s Perspective   You ll basically need to do the following    Start the Excel application  Open the Excel workbook  Retrieve the worksheet from the workbook by name or index  Iterate through all the Cells in the worksheet which were retrieved as a range  Sample  untested  code excerpt below for the last step         Excel Range allCellsRng      string lowerRightCell    IV65536       allCellsRng   ws get Range  A1   lowerRightCell  Cells      foreach  Range cell in allCellsRng                if  null    cell Value2    isBlank cell Value2                          Do something                    else if  isText cell Value2                          Do something                    else if  isNumeric cell Value2                          Do something                    For Excel 2007  try this MSDN reference

User · Answer

My VBA skills are a little rusty  but this is the general idea of what I d do  The easiest way to do this would be to iterate through a loop for every column   public sub CellProcessing   on error goto errHandler      dim MAX ROW as Integer    how many rows in the spreadsheet     dim i as Integer     dim cols as String      for i   1 to MAX ROW          perform checks on the cell here          access the cell with Range  A   amp  i  to get cell A1 where i   1     next i  exitHandler      exit sub errHandler      msgbox  Error    amp  err Number  amp        amp  err Description     resume exitHandler end sub   it seems that the color syntax highlighting doesn t like vba  but hopefully this will help somewhat  at least give you a starting point to work from     Brisketeer

User · Answer

Sub CheckValues1       Dim rwIndex As Integer     Dim colIndex As Integer     For rwIndex   1 To 10             For colIndex   1 To 5                 If Cells rwIndex  colIndex  Value  lt  gt  0 Then                       Cells rwIndex  colIndex  Value   0             Next colIndex     Next rwIndex End Sub   Found this snippet on http   www java2s com Code VBA-Excel-Access-Word Excel Checksvaluesinarange10rowsby5columns htm It seems to be quite useful as a function to illustrate the means to check values in cells in an ordered fashion   Just imagine it as being a 2d Array of sorts and apply the same logic to loop through cells

User · Answer

My VBA skills are a little rusty  but this is the general idea of what I d do  The easiest way to do this would be to iterate through a loop for every column   public sub CellProcessing   on error goto errHandler      dim MAX ROW as Integer    how many rows in the spreadsheet     dim i as Integer     dim cols as String      for i   1 to MAX ROW          perform checks on the cell here          access the cell with Range  A   amp  i  to get cell A1 where i   1     next i  exitHandler      exit sub errHandler      msgbox  Error    amp  err Number  amp        amp  err Description     resume exitHandler end sub   it seems that the color syntax highlighting doesn t like vba  but hopefully this will help somewhat  at least give you a starting point to work from     Brisketeer

User · Answer

My VBA skills are a little rusty  but this is the general idea of what I d do  The easiest way to do this would be to iterate through a loop for every column   public sub CellProcessing   on error goto errHandler      dim MAX ROW as Integer    how many rows in the spreadsheet     dim i as Integer     dim cols as String      for i   1 to MAX ROW          perform checks on the cell here          access the cell with Range  A   amp  i  to get cell A1 where i   1     next i  exitHandler      exit sub errHandler      msgbox  Error    amp  err Number  amp        amp  err Description     resume exitHandler end sub   it seems that the color syntax highlighting doesn t like vba  but hopefully this will help somewhat  at least give you a starting point to work from     Brisketeer

User · Answer

My VBA skills are a little rusty  but this is the general idea of what I d do  The easiest way to do this would be to iterate through a loop for every column   public sub CellProcessing   on error goto errHandler      dim MAX ROW as Integer    how many rows in the spreadsheet     dim i as Integer     dim cols as String      for i   1 to MAX ROW          perform checks on the cell here          access the cell with Range  A   amp  i  to get cell A1 where i   1     next i  exitHandler      exit sub errHandler      msgbox  Error    amp  err Number  amp        amp  err Description     resume exitHandler end sub   it seems that the color syntax highlighting doesn t like vba  but hopefully this will help somewhat  at least give you a starting point to work from     Brisketeer

User · Answer

Sub CheckValues1       Dim rwIndex As Integer     Dim colIndex As Integer     For rwIndex   1 To 10             For colIndex   1 To 5                 If Cells rwIndex  colIndex  Value  lt  gt  0 Then                       Cells rwIndex  colIndex  Value   0             Next colIndex     Next rwIndex End Sub   Found this snippet on http   www java2s com Code VBA-Excel-Access-Word Excel Checksvaluesinarange10rowsby5columns htm It seems to be quite useful as a function to illustrate the means to check values in cells in an ordered fashion   Just imagine it as being a 2d Array of sorts and apply the same logic to loop through cells

User · Answer

Sub CheckValues1       Dim rwIndex As Integer     Dim colIndex As Integer     For rwIndex   1 To 10             For colIndex   1 To 5                 If Cells rwIndex  colIndex  Value  lt  gt  0 Then                       Cells rwIndex  colIndex  Value   0             Next colIndex     Next rwIndex End Sub   Found this snippet on http   www java2s com Code VBA-Excel-Access-Word Excel Checksvaluesinarange10rowsby5columns htm It seems to be quite useful as a function to illustrate the means to check values in cells in an ordered fashion   Just imagine it as being a 2d Array of sorts and apply the same logic to loop through cells

User · Answer

There are several methods to accomplish this, each of which has advantages and disadvantages; First and foremost, you're going to need to have an instance of a Worksheet object, Application.ActiveSheet works if you just want the one the user is looking at.

The Worksheet object has three properties that can be used to access cell data (Cells, Rows, Columns) and a method that can be used to obtain a block of cell data, (get_Range).

Ranges can be resized and such, but you may need to use the properties mentioned above to find out where the boundaries of your data are. The advantage to a Range becomes apparent when you are working with large amounts of data because VSTO add-ins are hosted outside the boundaries of the Excel application itself, so all calls to Excel have to be passed through a layer with overhead; obtaining a Range allows you to get/set all of the data you want in one call which can have huge performance benefits, but it requires you to use explicit details rather than iterating through each entry.

This MSDN forum post shows a VB.Net developer asking a question about getting the results of a Range as an array

User · Answer

You can use a For Each to iterate through all the cells in a defined range   Public Sub IterateThroughRange    Dim wb As Workbook Dim ws As Worksheet Dim rng As Range Dim cell As Range  Set wb   Application Workbooks 1  Set ws   wb Sheets 1  Set rng   ws Range  A1    C3    For Each cell In rng Cells     cell Value   cell Address Next cell  End Sub

User · Answer

If you only need to look at the cells that are in use you can use   sub IterateCells       For Each Cell in ActiveSheet UsedRange Cells        do some stuff    Next  End Sub   that will hit everything in the range from A1 to the last cell with data  the bottom right-most cell

User · Answer

Sub CheckValues1       Dim rwIndex As Integer     Dim colIndex As Integer     For rwIndex   1 To 10             For colIndex   1 To 5                 If Cells rwIndex  colIndex  Value  lt  gt  0 Then                       Cells rwIndex  colIndex  Value   0             Next colIndex     Next rwIndex End Sub   Found this snippet on http   www java2s com Code VBA-Excel-Access-Word Excel Checksvaluesinarange10rowsby5columns htm It seems to be quite useful as a function to illustrate the means to check values in cells in an ordered fashion   Just imagine it as being a 2d Array of sorts and apply the same logic to loop through cells

User · Answer

In Excel VBA  this function will give you the content of any cell in any worksheet   Function getCellContent Byref ws As Worksheet  ByVal rowindex As Integer  ByVal colindex As Integer  as String     getCellContent   CStr ws Cells rowindex  colindex   End Function   So if you want to check the value of cells  just put the function in a loop  give it the reference to the worksheet you want and the row index and column index of the cell  Row index and column index both start from 1  meaning that cell A1 will be ws Cells 1 1  and so on

User · Answer

In Excel VBA  this function will give you the content of any cell in any worksheet   Function getCellContent Byref ws As Worksheet  ByVal rowindex As Integer  ByVal colindex As Integer  as String     getCellContent   CStr ws Cells rowindex  colindex   End Function   So if you want to check the value of cells  just put the function in a loop  give it the reference to the worksheet you want and the row index and column index of the cell  Row index and column index both start from 1  meaning that cell A1 will be ws Cells 1 1  and so on

User · Answer

If you re just looking at values of cells you can store the values in an array of variant type   It seems that getting the value of an element in an array can be much faster than interacting with Excel  so you can see some difference in performance using an array of all cell values compared to repeatedly getting single cells   Dim ValArray as Variant ValArray   Range  A1 IV   amp  Rows Count  Value   Then you can get a cell value just by checking ValArray  row   column

User · Answer

If you re just looking at values of cells you can store the values in an array of variant type   It seems that getting the value of an element in an array can be much faster than interacting with Excel  so you can see some difference in performance using an array of all cell values compared to repeatedly getting single cells   Dim ValArray as Variant ValArray   Range  A1 IV   amp  Rows Count  Value   Then you can get a cell value just by checking ValArray  row   column

User · Answer

If you only need to look at the cells that are in use you can use   sub IterateCells       For Each Cell in ActiveSheet UsedRange Cells        do some stuff    Next  End Sub   that will hit everything in the range from A1 to the last cell with data  the bottom right-most cell

User · Answer

For a VB or C  app  one way to do this is by using Office Interop   This depends on which version of Excel you re working with   For Excel 2003  this MSDN article is a good place to start  Understanding the Excel Object Model from a Visual Studio 2005 Developer s Perspective   You ll basically need to do the following    Start the Excel application  Open the Excel workbook  Retrieve the worksheet from the workbook by name or index  Iterate through all the Cells in the worksheet which were retrieved as a range  Sample  untested  code excerpt below for the last step         Excel Range allCellsRng      string lowerRightCell    IV65536       allCellsRng   ws get Range  A1   lowerRightCell  Cells      foreach  Range cell in allCellsRng                if  null    cell Value2    isBlank cell Value2                          Do something                    else if  isText cell Value2                          Do something                    else if  isNumeric cell Value2                          Do something                    For Excel 2007  try this MSDN reference

User · Answer

In Excel VBA  this function will give you the content of any cell in any worksheet   Function getCellContent Byref ws As Worksheet  ByVal rowindex As Integer  ByVal colindex As Integer  as String     getCellContent   CStr ws Cells rowindex  colindex   End Function   So if you want to check the value of cells  just put the function in a loop  give it the reference to the worksheet you want and the row index and column index of the cell  Row index and column index both start from 1  meaning that cell A1 will be ws Cells 1 1  and so on

User · Answer

You basically can loop over a Range  Get a sheet  myWs    Worksheet MyWb Worksheets 1     Get the Range you re interested in If you really want to check every cell use Excel s limits      The Excel 2007  Big Grid  increases   the maximum number of rows per   worksheet from 65 536 to over 1   million  and the number of columns   from 256  IV  to 16 384  XFD     from here http   msdn microsoft com en-us library aa730921 aspx Office2007excelPerf BigGridIncreasedLimitsExcel   and then loop over the range          Range myBigRange   myWs get Range  A1    A256             string myValue           foreach Range myCell in myBigRange                         myValue   myCell Value2 ToString

User · Answer

If you re just looking at values of cells you can store the values in an array of variant type   It seems that getting the value of an element in an array can be much faster than interacting with Excel  so you can see some difference in performance using an array of all cell values compared to repeatedly getting single cells   Dim ValArray as Variant ValArray   Range  A1 IV   amp  Rows Count  Value   Then you can get a cell value just by checking ValArray  row   column

User · Answer

If you only need to look at the cells that are in use you can use   sub IterateCells       For Each Cell in ActiveSheet UsedRange Cells        do some stuff    Next  End Sub   that will hit everything in the range from A1 to the last cell with data  the bottom right-most cell

User · Answer

You basically can loop over a Range  Get a sheet  myWs    Worksheet MyWb Worksheets 1     Get the Range you re interested in If you really want to check every cell use Excel s limits      The Excel 2007  Big Grid  increases   the maximum number of rows per   worksheet from 65 536 to over 1   million  and the number of columns   from 256  IV  to 16 384  XFD     from here http   msdn microsoft com en-us library aa730921 aspx Office2007excelPerf BigGridIncreasedLimitsExcel   and then loop over the range          Range myBigRange   myWs get Range  A1    A256             string myValue           foreach Range myCell in myBigRange                         myValue   myCell Value2 ToString

User · Answer

You can use a For Each to iterate through all the cells in a defined range   Public Sub IterateThroughRange    Dim wb As Workbook Dim ws As Worksheet Dim rng As Range Dim cell As Range  Set wb   Application Workbooks 1  Set ws   wb Sheets 1  Set rng   ws Range  A1    C3    For Each cell In rng Cells     cell Value   cell Address Next cell  End Sub

User · Answer

You can use a For Each to iterate through all the cells in a defined range   Public Sub IterateThroughRange    Dim wb As Workbook Dim ws As Worksheet Dim rng As Range Dim cell As Range  Set wb   Application Workbooks 1  Set ws   wb Sheets 1  Set rng   ws Range  A1    C3    For Each cell In rng Cells     cell Value   cell Address Next cell  End Sub

[vba] Iterating through all the cells in Excel VBA or VSTO 2005

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