system.data.datatable

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How to compare to datatable with different columns

I have the EMP datatable it contains 500 recordslike this: UserAceNumberUserID emp001 emp002 emp003 emp004[详细]

2023-04-07 14:54 分类：问答
Autonumber and datatable with dbnull exception

i was doing some work on a datatable i filled with a oledbdataadapter made from an access database. and i stumbled upon this error:[详细]

2023-04-02 09:46 分类：问答
Join Datatables from a loop and merge in one Dataset

I have this requirement that the user request one or more partnumbers.And i need to display all the result in one Data Set[详细]

2023-03-16 15:08 分类：问答
Create a sequence of anonymous types from the rows in a DataTable

This is a \"let\'s see if it can be done\" exercise more than anything else. Suppose I have a DataTable with several columns.Using linq, is it possible to select the rows of the table such that the r[详细]

2023-03-13 02:14 分类：问答
c# - create a datatable from a class (not a list of instances)

This question concerns generics and types as well as datatables. The following snippet is around the net here and there, and creates a datatable based on a generic type:[详细]

2023-03-11 07:14 分类：问答
Converting DataTable to string type

I have a function like this public DataTable GetAllPrimaryKeyTables(string localServer, string userName, string password, string selectedDatabase)[详细]

2023-01-29 05:16 分类：问答
How should I manage large DataTables?

For reasons that don\'t make a lot of sense (Read: Not my decision) I need to keep a large number of rows, about ~90,000, in a DataTable and I do not have the option of using a database.[详细]

2023-01-22 09:21 分类：问答
How to store sorted records in csv file?

I sort the records of the datatable datewise with the column TradingDate which is type of datetime. TableWithOnlyFixedColumns.DefaultView.Sort = \"TradingDate asc\";[详细]

2022-12-29 00:09 分类：问答
Group By and Sort by Column in CMFCListCtrl

I have a derivedCMFCListCtrl which I can used group by and sort by fine via a contect menu. However when group by is being used and I select a column to sort by开发者_JAVA技巧 (by clicking on the colo[详细]

2022-12-17 20:20 分类：问答