(Server=;Port=5432;User Id=joe;Password=secret;Database=joedata;)) { conn.Open(); // Declare the parameter in the query string using(NpgsqlCommand command = new NpgsqlCommand(select * from tablea where column1 = :column1, conn)) { // Now add the parameter to the parameter collection...
方法： 1 lr_save_string 该函数主要是将程序中的常量或变量保存为lr中的参数 2 lr_eval_string 从...
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If you execute multiple commands (say, inserting 3 rows or performing multiple selects), you're executing multiple roundtrips; each command has to complete before the next command can start execution. Depending on your network latency, this can considerably degrade your application's performance. ...
C# to query SQL and store results in a variable C# to read S.M.A.R.T. information of SSD C# to run code based on day of week C# to select only excel file in directory path C# totaling calculated work time in just hours and minutes C# Two-dimension Array and DataGridView C# Type ...
{returnawaitcon.QueryAsync<Teacher>($"SELECT * FROM {Teacher.TableName} WHERE subject='{subject}'"); } For the above code to work, the classTeachershould have a constructor accepting all the table columns as parameters, like so: publicTeacher(intid,stringfirst_name,stringlast_name,stringsubj...
C# to query SQL and store results in a variable C# to read S.M.A.R.T. information of SSD C# to run code based on day of week C# to select only excel file in directory path C# totaling calculated work time in just hours and minutes C# Two-dimension Array and DataGridView C# Type ...
use connection = new NpgsqlConnection("YOUR CONNECTION STRING") connection.Open() let users = connection |> Sql.existingConnection |> Sql.query "SELECT * FROM users" |> Sql.execute (fun read -> { Id = read.int "user_id" FirstName = read.text "first_name" }) Note in this example,...
Exception that raised the event:Npgsql.NpgsqlException (0x80004005): Received backend message ReadyForQuery while expecting ParseCompleteMessage.hangfire-postgres/Hangfire.PostgreSql#166 This happened to me when I put abreakpoint between two new async connectionsaselect, second aninsert. It's only th...
I am getting random error messages in my application log with the following stack trace. Most of the time everything is working well. I get about 10 errors and log messages like this a day in the production system. How do I figure out wh...