Dapper | Dapper - a simple object mapper for Net | SQL Database library

 by   DapperLib C# Version: 2.0.138 License: Non-SPDX

kandi X-RAY | Dapper Summary

kandi X-RAY | Dapper Summary

Dapper is a C# library typically used in Database, SQL Database applications. Dapper has no bugs, it has no vulnerabilities and it has medium support. However Dapper has a Non-SPDX License. You can download it from GitHub.

Dapper - a simple object mapper for .Net

            kandi-support Support

              Dapper has a medium active ecosystem.
              It has 16203 star(s) with 3619 fork(s). There are 951 watchers for this library.
              It had no major release in the last 12 months.
              There are 372 open issues and 832 have been closed. On average issues are closed in 283 days. There are 57 open pull requests and 0 closed requests.
              It has a neutral sentiment in the developer community.
              The latest version of Dapper is 2.0.138

            kandi-Quality Quality

              Dapper has 0 bugs and 0 code smells.

            kandi-Security Security

              Dapper has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              Dapper code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              Dapper has a Non-SPDX License.
              Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

            kandi-Reuse Reuse

              Dapper releases are available to install and integrate.
              It has 30 lines of code, 0 functions and 149 files.
              It has low code complexity. Code complexity directly impacts maintainability of the code.

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            Dapper Key Features

            No Key Features are available at this moment for Dapper.

            Dapper Examples and Code Snippets

            No Code Snippets are available at this moment for Dapper.

            Community Discussions


            Creating a specific dataset with LINQ
            Asked 2022-Apr-08 at 13:50

            I have trouble with creating one specific "dataset" from list of objects which I get via Dapper from database. So the thing is about daily attendancies in company, so user comes and click and goes out and click and we have one table row like this: sql table So I have a model class like this:



            Answered 2022-Apr-08 at 12:31

            You probably won't be able accomplish that with just LINQ. You should be able to loop over the items returned in the results that you just fetched, and do your logic there.

            Implement a function like this, and call it after retrieving your results. You could even handle the database querying in this function too if you'd like, then just call the function and get back your list.

            Source https://stackoverflow.com/questions/71796865


            Why is an Azure Function on .NET 6 looking for System.ComponentModel Version
            Asked 2022-Mar-30 at 09:48

            I am deploying an Azure Function called "Bridge" to Azure, targeting .NET 6. The project is referencing a class library called "DBLibrary" that I wrote, and that library is targeting .NET Standard 2.1. The Azure Function can be run locally on my PC without runtime errors.

            When I publish the Azure Function to Azure, I see in Azure Portal a "Functions runtime error" which says:

            Could not load file or assembly 'System.ComponentModel, Version=, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.

            I do not target System.ComponentModel directly, and I don't see a nuget package version 6.0.0 for "System.ComponentModel" available from any nuget feed. Why is the Azure function looking for this version 6.0.0 of System.ComponentModel? If that version does exist, why can't the Azure Function find it?

            Here are the relevant parts of the csproj for the "Bridge" Azure Function:



            Answered 2022-Feb-25 at 10:33

            The .net standard you are using 2.1 but ,Microsoft.Azure.Functions.Extensions can be support upto .NET Standard 2.0

            You should add the below package to your function app and deploy to Azure again.

            Source https://stackoverflow.com/questions/71255419


            How to setup .NET 6 with Dapper Identity and Discord Login
            Asked 2022-Jan-29 at 17:34

            I'm trying to figure out how to setup a login via Discord Oauth2 while using Dapper as my ORM.

            Microsoft has a guide here that I have followed to setup all of my stores. I infact can call CreateAsync() method and a user gets created in my database, so I believe that side of things is completely setup.

            My issues lie within external login. Below you will find what I have tried.




            Answered 2022-Jan-29 at 17:34

            Firstly... We need to take a look at the implementation of the internal method GetExternalLoginInfoAsync inside SignInManager.cs and take note of all the conditions that could possibly lead to null being returned.

            I will provide my answer as comments within the code below:

            Source https://stackoverflow.com/questions/70794402


            Is there some way with dapper object in object to load in sfdatagrid?
            Asked 2022-Jan-07 at 17:22

            I am using Dapper and when i execute query and load to SfDataGrid only show results from first table.




            Answered 2022-Jan-07 at 17:22

            Supposing you have a class Roles like this one

            Source https://stackoverflow.com/questions/70613321


            SqlClient connection pool maxed out when using async
            Asked 2021-Dec-11 at 12:54

            I have a busy ASP.NET 5 Core app (thousands of requests per second) that uses SQL Server. Recently we decided to try to switch some hot code paths to async database access and... the app didn't even start. I get this error:

            The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached.

            And I see the number of threads in the thread pool growing to 40... 50... 100...

            The code pattern we use is fairly simple:



            Answered 2021-Dec-11 at 12:54

            Well, after a bit of digging, investigating source codes and tons of reading, it appears that async is not always a good idea for DB calls.

            As Stephen Cleary (the god of async who wrote many books about it) has nailed it - and it really clicked with me:

            If your backend is a single SQL server database, and every single request hits that database, then there isn't a benefit from making your web service asynchronous.

            So, yes, async helps you free up some threads, but the first thing these threads do is rush back to the database.

            Also this:

            The old-style common scenario was client <-> API <-> DB, and in that architecture there's no need for asynchronous DB access

            However if your database is a cluster or a cloud or some other "autoscaling" thing - than yes, async database access makes a lot of sense

            Here's also an old archive.org article by RIck Anderson that I found useful: https://web.archive.org/web/20140212064150/http://blogs.msdn.com/b/rickandy/archive/2009/11/14/should-my-database-calls-be-asynchronous.aspx

            Source https://stackoverflow.com/questions/69189208


            Dapper Exception - "The ConnectionString property has not been initialized" when 'buffered' is 'false'
            Asked 2021-Sep-13 at 11:34

            I am trying out Dapper and I have stumbled upon this exception:



            Answered 2021-Sep-13 at 10:42

            I suspect the real problem here is that you are returning an open queryable, which means you're leaving the scope of the using block and disposing the connection that is still being used. The real problem here is an object disposed too soon, but it is manifesting in an unusual way.

            Basically, you need to not dispose the connection until you're done with the data that needs the connection. A lazy way of doing this would be:

            Source https://stackoverflow.com/questions/69161093


            Why does a dapper query fail and a ado call not?
            Asked 2021-Sep-05 at 08:33

            In netcore 5 C# I check at the start of the application if the database is on the latest version if not, depending on the version installed at the specific customer, it updates automagically (and does specific things per customer).

            I was refactoring and tried to see if I could replace the current sql execution call with a Dapper call but failed:

            a. I have for example this piece of sql in a string:



            Answered 2021-Sep-05 at 08:33

            Additional speculation (comes "after" the below historically, but "before" in terms.of things to try) based on my thoughts in a comment: without changing the property at all, you could try adding

            Source https://stackoverflow.com/questions/69059732


            How do I add multiple "WHERE conditionA OR conditionB OR conditionC" in SQL parameter?
            Asked 2021-Aug-29 at 01:41

            I am doing pagination. What I have now is:



            Answered 2021-Aug-27 at 15:04

            You just use more parameters:

            Source https://stackoverflow.com/questions/68953910


            How to specify a Schema while mapping with DapperExtensions?
            Asked 2021-Jul-13 at 14:06

            I'm trying to get all records from SQL database using DapperExtensions.

            But I have a Schema set to other than dbo for some tables. Hence, the table is not recognized from sql query.

            For example, a table is in the form [Schema][TableName]. But when I start query, error is thrown like:

            Invalid object name 'TableName'.

            This is the Model class:



            Answered 2021-Jul-13 at 13:59

            While mapping your models, be bit more explicit. Mention the Schema explicitly.
            Following is an example how to provide various mapping properties.

            Source https://stackoverflow.com/questions/68363594


            How to customize SQL query according to GraphQL request using HotChocolate and Dapper?
            Asked 2021-Jul-10 at 06:52

            I'm using HotChocolate as my GraphQL server and Dapper to access the database in my project. Currently With each graphql query requesting "some" fields of an entity, the whole row is queried from database and this is wasting resources especially when querying lists of data. I want to customize the sql query according to the requested fields in the graphql query. So, this



            Answered 2021-Jul-07 at 14:21

            Well, I managed it (honestly, I used it because of aggregation field feature), but via another package NReco.GraphQL - it takes exactly those fields that you set in the GraphQL query.

            Source https://stackoverflow.com/questions/68264025

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


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