Front End design. The front end design of the web page contains a FileUpload Control, a Button which will be used to upload the Excel File, RadioButtonList for the user to select whether headers are present or not by default Yes is selected and finally the GridView control in which I have set AllowPaging property to true.
Uploading and Reading the Excel Sheet. Next comes the part to upload the file and reading it. As you will notice in the aspx I have added OnClick event handler to the Upload button which will be triggered when the upload button is clicked. When the upload button is clicked the uploaded File is saved to a Folder whose path is defined in the App Settings section in the Web.
Config using the following key. Below is the code snippet for the Upload button event handler. GetFileName FileUpload1.
FileName ;. GetExtension FileUpload1. AppSettings[ "FolderPath" ];. SaveAs FilePath ;. Text ;. If FileUpload1. HasFile Then. AppSettings "FolderPath". SaveAs FilePath. End If. End Sub. Based on the extension I decide the driver to be used in order to read the excel file and also whether Excel will be read along with header row or not based on the RadioButtonList.
All these values are filled in the placeholders of the connection string. After that I read the schema of the Excel Workbook in order to find out the Sheet Name of the first sheet.
Once I get that I fire a select query on the first Excel sheet and fill a datatable which is then passed to the GridView as data source. You can refer the complete function below. ConnectionStrings[ "Excel03ConString" ]. ConnectionStrings[ "Excel07ConString" ]. Open ;. I need to be able to generate an excel file containing data from a subset of that form.
Community Bot 1 1 1 silver badge. Valuk Valuk 1, 3 3 gold badges 15 15 silver badges 21 21 bronze badges. Add a comment. Active Oldest Votes. UPDATE September My original answer below was over 3 years old, so I thought I would update as I no longer create files on the server when downloading files via AJAX however, I have left the original answer as it may be of some use still depending on your specific requirements.
SaveAs memoryStream ; memoryStream. The window. Combine Server. This looks like a good potential option, but before I go ahead with it, are there no other alternatives that don't involve creating the file on the server first? Not that I am aware of - this approach I have used successfully many times. From the users perspective it is seamless, the only thing to be mindful of is that you will need a housekeeping routine to tidy up the files that are created as they will mount up over time.
Great, why don't you put the old answer at the bottom? And the new answer at the top, so people don't waste time — goamn. Show 13 more comments. AGuyCalledGerald 7, 16 16 gold badges 67 67 silver badges bronze badges.
Luchian Luchian 2 2 silver badges 3 3 bronze badges. How exactly would you do that? Sounds interesting. An example would be nice i mean how to store it in the cache, not generating the excel file. How scalable is this though? If a user is downloading several large reports? SaveXlsx stream ; stream. Andy S Andy S 1 1 silver badge 2 2 bronze badges.
I had a similar approach. WriteDataTableToExcel dt, ". Create, FileAccess. Write ; exportData. WriteTo file ; file. Result as FilePathResult. Elvin Acevedo Elvin Acevedo 99 1 1 silver badge 6 6 bronze badges. Chris Andrews 33 6 6 bronze badges.
Niclas Niclas 3 3 silver badges 9 9 bronze badges. Nichlas I had started using TempData also, your answer prompted me to update mine to reflect this!
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Johnson Manohar August 28, Step 2: Create a new workbook instance with one worksheet. Step 7: Save the Excel file and close its instances. The following code sample shows how to export data from a database to an Excel table. Excel; application. DataSet and System. DataTable as a data source for real-time data servers. Also see watch a video tutorial on Programming RTD servers. This is the code sample for the RTD server project described in our developer tutorial.
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