I have an old website developed in asp.net 2.0 and C#, I want to save data from database or DataTable To Excel File.
1.Create excel file. How to write some data to excel file. Database Data to Excel File (C#) 0. C# Write to an open Excel file using Interop.
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I searched a lot in the internet but ONLY found solutions using the HttpResponce 'Responce.Write' but this solution will not work if the file is big so I want a solution to save the excel file physically on the hard drive.
3 Answers
Automated lip reading software download. In most cases you would even need to have MS Excel installed in the machine where you want to run your application, in order to use Excel related libraries (ie Microsoft.Office.Interop namespace).Could you use CSV files? This could be much simpler. Just load your DataTable object into a FileStream then save the file.
What environment do you have there, which version of Excel the result file should target to? Depending on that, the answer can be different. But more or less generic one - try to use GemBox.Spreadsheet, which doesn't require Excel to be installed but it has limitations in the free version.
i found the solution if i have no Excel installed on the machine and decided to share it with public
Solution 1 (if you need to save the excel file physically on the hard disk)
you will need a gridview to put the data in it first without any css or styles just get the selected data from database with the format you need on excel file
code behind
Just Note you need to make the GridView visible true first to render it to file if it is visible false then nothing to render then you can make it false again as it is used only to hold data then render it to file
Solution 2 (if you need to just create the file on the fly then just download it to client directly)
Py2exe 2.7. If you use Python 3 on your machine outside of an environment, you will need to use the python3 and pip3 commands exclusively.
Just note that i found these functions on my search but i don't try then as i need the first solution but only wanted to share the other solution for public as well
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I'm trying create a excel file based in a Dataset.
This is my really simple code.
but my excel file result in this:
I have to pass to Export a iqueryble. I think is there my mistake.
C# Save Excel File
1 Answer
You're seeing the actual properties defined in DataRow, not the columns of your table.
You need to change your Export() method to check for & consume IListProvider to get custom PropertyDescriptors for the columns, or use classes with actual properties (eg, an anonymous type) instead of DataTable.