Recent questions tagged ADO.NET

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ado.net - Delete all rows in a datatable

I need to delete all the rows in a datatable (ADO.net). I dont want to use Foreach here. In one single ... this if you able to provide answer. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ado.net - System.Data.SqlClient Namespace for MySQL?

The exception says that there is a network related problem, or that the SQL server does not allow remote access, ... and not MS SQL? Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ado.net - How do I bulk insert with SQLite?

How do I bulk insert with SQLite? I looked it up and it seems like I do an insert with a select ... Value = 1; command.ExecuteNonQuery(); See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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685 views

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ado.net - New transaction is not allowed because there are other threads running in the session

Getting "new transaction is not allowed because there are other threads running in the session". It has nothing to ... ["_DEFAULT"]; } } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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315 views

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ado.net - Nhibernate FieldNameLookup throws IndexOutOfRangeException

Every now and then we get this very weird error NHibernate.ADOException: could not execute query [ SELECT this_.Id ... , Can anyone help please? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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405 views

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ado.net - in f# match statement how do I match to the type byte[]?

I'm trying to lookup DbType enumeration values from .net types. I'm using a match statement. However I cannot ... would be open to suggestions. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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367 views

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ado.net - How to delete many-to-many relationship in Entity Framework without loading all of the data

Does anyone know how to delete many-to-many relationship in ADO.NET Entity Framework without having to load all ... mean lots) of subscriptions. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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558 views

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ado.net - Microsoft Access UPDATE command using C# OleDbConnection and Command NOT working

I'm using Microsoft Access unfortunately because of higher forces and trying to update a record with no luck. This ... what am I doing wrong? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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552 views

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ado.net - How to view a DataTable while debugging

I'm just getting started using ADO.NET and DataSets and DataTables. One problem I'm having is it seems pretty ... to flush my stream writer. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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584 views

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ado.net - Access 2007 - INSERT and instant SELECT doesn't retrieve the inserted data

I'm inserting a few rows in a table via OleDB, and select instantly the inserted row. I can't retrieve the row ... logic or other ways....) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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544 views

1 answer

ado.net - How to map Table per Type (TPT) inheritance in Entity designer?

I have created a good amount of tables in my database, here are the problem ones: Table Name -Item ItemID - PK ... any ideas how to solve this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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688 views

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ado.net - Are there any reserved words in SQLite?

Three questions about reserved words: Are there any reserved words in SQLite? If so, what are they? If there ... to query a SQLite database? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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367 views

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ado.net - How to create a DataTable in C# and how to add rows?

How do create a DataTable in C#? I did like this: DataTable dt = new DataTable(); dt.clear(); dt.Columns.Add(" ... for Marks. How can I do this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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