linq-to-dataset

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Why is LINQ JOIN so much faster than linking with WHERE?

I\'ve recently upgraded to VS 2010 and am playing around with LINQ to Dataset. I have a strong typed dataset for Authorization that is in HttpCache of an ASP.NET WebApplication.[详细]

2023-02-22 08:15 分类：问答
have join multiple table and get the output in DataRow in LINQ

HI, I have a scenario where i have join multiple table and get the output in DataRow(All the Rows return by the query).[详细]

2023-02-19 07:38 分类：问答
how to create a pivot table with dynamic column using linq tree expression

I\'m writing an asp.net C# web application; i have an in-memory datatable named \'table1\' having three columns \'country\', \'productId\' and \'productQuantity\';[详细]

2023-02-08 22:57 分类：问答
LINQ to DataSet to get generic list from DataTable

DataTable table = DataProvider.GetTable() var clientIds = from r in table.AsEnumerable() select r.Fi开发者_如何学JAVAeld<string>(\"CLIENT_ID\");[详细]

2023-02-03 12:00 分类：问答
Linq to DataTable not producing Distinct values

I have a datatable which has been dynamically generated from FoxPro tables using a UNION Select statement. e.g.[详细]

2023-01-20 22:44 分类：问答
Query a DataSet using LINQ

I have a DataSet that I fill with a SQL select query. I then need to perform an extra query on this DataSet to filter the data some more, using LINQ to DataSet. I then want to hook this LINQ result up[详细]

2023-01-20 06:52 分类：问答
Copying Result of Linq into DataTable

What changes do i need to make so as to reduce of doing this task with fewer lines and better approach.[详细]

2023-01-08 14:49 分类：问答
Syntax for LINQ to DataSets Row Filter in C#?

I have two DataTables one is Primary Table and the rest is a sub table (I am using strongly typed dataset).[详细]

2023-01-08 08:47 分类：问答
Update/Insert to a table using SQLCeResultSet

I have a SQL Compact Edition Database that I update periodically (via web services). The part where I write to the database is taking way too long.I am currently doing it with Linq to Datasets (as se[详细]

2023-01-06 06:00 分类：问答
Why I am getting Null from this statement. Query Syntax in C#

This is not working. Returns Null to dept_list. var dept_list = ((from map in DtMapGuestDepartment.AsEnumerable()[详细]

2023-01-01 15:08 分类：问答