I know how to write to a cell, but how do I get an already existing string written inside a cell in an excel file into a string object so I can use it to generate data in other cells?
My code so far:
Excel.ApplicationClass excelApp = new Excel.ApplicationClass();
excelApp.Visible = true;
Excel.Workbook excelWorkbook = excelApp.Workbooks.Open("C:\\Users\\user\\Desktop\\list.xls", 0, false, 5, "", "",
false, Excel.XlPlatform.xlWindows, "", true, false, 0, true, false, false);
Excel.Sheets excelSheets = excelWorkbook.Worksheets;
string currentSheet = "Sheet1";
Excel.Worksheet xlws = (Excel.Worksheet)excelSheets.get_Item(currentSheet);
I can manipulate cell contents using something like:
xlws.Cells[1,1] = "foo";
But I'm having trouble doing the opposite, that is reading cell contents into a string in my program.
Any help would be appreciated.
string myString = xlws.Cells[1, 1].Value as string;
string myString = ((Excel.Range)workSheet.Cells[1, 1]).Value2.ToString();
To avoid NullReferenceException
, don't use .ToString()
directly on types that can be null ( object
, dynamic
, string
, etc.). Here are few safer ways to convert object to string:
Convert.ToString(object)
- returns String.Empty
when object is null
object?.ToString()
- VS 2015 Null-conditional Operator returns null if object is null
object?.ToString() ?? ""
object?.ToString() ?? ""
- C# null-coalescing operator ??
to return ""
when object is null
object + ""
- String.Concat to return ""
when object is null
$"{object}"
- VS 2015 string interpolation is transformed at compile time to invoke an equivalent String.Format("{0}", object)
call, and returns ""
when object is null
xlws.Cells[1, 1].Value has type object . So you should indicate the type For examples:
xlws.Cells[1,1].Value.ToString();
There are a couple of ways to get the values from an excel docuemnt but the way I think you're looking for is:
Range range = xlws.get_range("A1", "A1");
object[] data = range.get_Value(XlRangeValueDataType.xlRangeValueDefault);
string str = (string)data[0];
A nice article that explains the other ways too is available here
Hope that helps.
string val = sheet.Cells[1, 6].Text;
This was the best method to get text from cell. I could get just same text without any change.
I can suggest one more way is (If you need to read string from row 3 column "I":
Excel.Application objExcel = new Excel.Application();
objExcel.Visible = true;
Excel.Workbook objBook = o objExcel.Workbooks.Open("C:\\myexcel.xlsx");
Excel.Worksheet objsheet = objBook.Worksheets["Sheet1"];
string a = Convert.ToString(objsheet.Cells.get_Item(3,"I").Value);
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