npgsql

问题 I'm trying to select a number of fields, one of which needs to be an array with each element of the array containing two values. Each array item needs to contain a name (character varying) and an ID (numeric). I know how to return an array of single values (using the ARRAY keyword) but I'm unsure of how to return an array of an object which in itself contains two values. The query is something like SELECT t.field1, t.field2, ARRAY(--with each element containing two values i.e. {'TheName', 1 }

问题 I am using Npgsql to query a database table and show the results on my page/view. The code works fine WITHOUT the where clause and parameters as it gets all the rows from the table onto the view. Now I am trying to incoporate a search string variable (if the user types in the string, then give me the table records that contain this string). My code is as follows string searchValue = TempData["String"].ToString(); var model = new List<ProductViewModel>(); NpgsqlConnection connection = new

问题 I am trying to execute a parametrised query from C# and I get the error: ERROR: XX000: parse error - invalid geometry with the hint "POLYGON((:m" <-- parse error at position 11 within geometry But when I run the query in pgAdmin III replacing the parameters with their values the query works. The code is command.CommandText = "SELECT area_code FROM area WHERE ST_INTERSECTS(ST_GeographyFromText('POLYGON((:minx :miny, :minx :maxy, :maxx :maxy, :maxx :miny, :minx :miny))'), shape) AND area_type

问题 I'm not a programmer and I haven´t Visual Studio installed in my PC but I need npgsql to connect Microsoft PowerBI (Power Query) to a Postgres instance. Is there a way to install it without having to compile it? Is it necessary to do special configurations in my PC to make it work? Thank you very much. Javier 回答1: To expand on @Shay's comment, you can use nuget if you want the latest version of Npgsql. You don't need to install nuget.exe; you can down download the latest nuget package from

问题 I am trying to use EF 6 Code First with Npgsql provider. When I try to run Add-Migration command in package manager I have the following exception: Failed to find or load the registered .Net Framework Data Provider. PM> Add-Migration -Force -ConfigurationTypeName "TestDbContextMigration" -ConnectionString "Server=localhost;Port=5432;Database=test_db;User Id=test;Password=konnaya;" -ConnectionProviderName "Npgsql" cmdlet Add-Migration at command pipeline position 1 Supply values for the

问题 I've test the db connection without Websecurity and it works. I've followed the tutorial from Brice Lambson http://brice-lambson.blogspot.com.es/2012/10/entity-framework-on-postgresql.html But when I use WebSecurity.InitializeDatabaseConnection("myContext", "UserProfile", "UserId", "UserName", autoCreateTables: false); I get this exception: System.InvalidOperationException was caught HResult=-2146233079 Message=No user table found that has the name "UserProfile". Source=WebMatrix.WebData

问题 I've test the db connection without Websecurity and it works. I've followed the tutorial from Brice Lambson http://brice-lambson.blogspot.com.es/2012/10/entity-framework-on-postgresql.html But when I use WebSecurity.InitializeDatabaseConnection("myContext", "UserProfile", "UserId", "UserName", autoCreateTables: false); I get this exception: System.InvalidOperationException was caught HResult=-2146233079 Message=No user table found that has the name "UserProfile". Source=WebMatrix.WebData

问题 Good afternoon. I'm having troubles getting connected to a Postgres database. The app I'm working on has to run on .NET 4. I'm using Npgsql, and because I'm limited to .NET 4, I'm using Npgsql version 2.2.7 (I believe 3+ requires .NET 4.5). The application will be running on the same machine as Postgres is. The database is installed and set up by a third party, and for that reason I'm unable to change the pg_hba.conf file. My first stab at a connection string looked like this: Server

问题 I am trying to retrieve all the columns from a table using ExecuteReader in C# application.Db is postgre.To test i created a console application following a tutorial which did showed how to query using a Function but not with passing parameters.The console application function for test static void Main(string[] args) { // Connect to a PostgreSQL database NpgsqlConnection conn = new NpgsqlConnection("Server=localhost;User Id=postgres; " + "Password=pes;Database=pmc;"); conn.Open(); // Define a

问题 I am working on a project using EntityFramework 6.1.1 and npgsql 2.2.3 within Visual Studio 2012 Update 4. To do so I installed npgsl using the supplied setup and installed the nuget packages "Npgsql" and "Npgsql for Entity Framework" (and "EntityFramework" itself, of course). Every thing used to be fine: I could successfully access my database for a while - until at some day everything "blew up". This is the event history: Fixing compiler errors after a major code upgrade I encountered these