https://github.com/karenpayneoregon/sqldatatablelarge-visual-basic

Code sample partitioning a large DataTable for export to csv
https://github.com/karenpayneoregon/sqldatatablelarge-visual-basic

async csv vbnet

Last synced: about 6 hours ago
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Code sample partitioning a large DataTable for export to csv

• Host: GitHub
• URL: https://github.com/karenpayneoregon/sqldatatablelarge-visual-basic
• Owner: karenpayneoregon
• Created: 2020-12-17T00:32:14.000Z (about 4 years ago)
• Default Branch: master
• Last Pushed: 2020-12-17T01:25:09.000Z (about 4 years ago)
• Last Synced: 2024-11-30T19:24:26.727Z (about 2 months ago)
• Topics: async, csv, vbnet
• Language: Visual Basic .NET
• Homepage:
• Size: 1.73 MB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: readme.md

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README

        
# About

Simple no frills code sample to demonstrate exporting large DataTable to a comma delimited text file.

The focus in the code sample is Partitioning DataRows, see notes below.

![screen](assets/A1.png)

### Requires

- To run this code sample **as is** [Microsoft Visual Studio 2019](https://visualstudio.microsoft.com/vs/) is required. If using for instance Visual Studio 2017 simply copy the files into a new Visual Studio solution and build/run.

- Microsoft SQL-Server (at least [Express edition](https://www.microsoft.com/en-us/download/details.aspx?id=55994))

- Plus [Microsoft SQL-Server Management Studio](https://www.microsoft.com/en-us/download/details.aspx?id=55994) (for running the script)

- Run the file script.sql to create the database, table along with populating the table.

- if the build fails run NuGet Restore packages.

### Notes

- No assertion performed on data, each DataRow is exported by String.Join on ItemArray of each row.

- Partitioning is done using a language extension.

- Partition is done [asynchronously](https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/concepts/async/) with an option to cancel

- File name is hard-coded.