StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
primarykey
Id
1905413
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2009-12-15T05:50:32.647
FavoriteCount
0
LastActivityDate
2009-12-15T06:05:25.410
LastEditDate
2009-12-15T06:05:25.410
LastEditorUserId
179972
OwnerUserId
179972
ParentId
1905193
PostTypeId
2
Score
0
ViewCount
0
LastEditorDisplayName
text
Body
Yes, there are many ways to add two ArrayList instances to one DataTable instance. Here is one way that shows how to add any number of ArrayLists to one DataTable using a complete code sample compiled to the .NET Framework 2.0. Note: Other people are doing a good job trying decipher what you're up to - I'm just going to answer the question directly with a full code snippet in case you can gain any insights from it for yourself. This really isn't a complex answer - it just sets up a couple of ArrayList instances first with sample data to pertain to your question and provides a snippet at the end to test the solution. Please comment what insights you find in here, if any. Thank you. <pre><code>namespace Com.StackOverflow { using System.Diagnostics; using System.Data; using System.Collections; public static class SOQuestion__Add_two_arraylists_in_a_datatable { public static void AnswerQuestionDirectly() { // - - - - - - - - Prelimary setup to question - - - - - - - - // Sample list of filenames (3 elements in total). ArrayList listFilenames = new ArrayList( new[] {@"C:\a.dat", @"C:\b.dat", @"C:\c.dat"} ); // Sample list of error counts (2 elements in total). ArrayList listFailureCounts = new ArrayList( new[] {88,51} ); // - - - - - - A Direct answer to the question - - - - - - - // Create DataTable structure with one column. DataTable dTable = new DataTable(); dTable.Columns.Add("Column 1"); /* Populate DataTable with all lists at once. * Note: keep appending * to { array initialization list } all lists you want included * in the DataTable instance. */ foreach (ArrayList currentList in new[] { listFilenames, listFailureCounts }) { foreach (object element in currentList) dTable.Rows.Add(new[] { element }); // one column per row } // - - - - - - - - Test it for expected counts - - - - - - - - int totalExpected = listFilenames.Count + listFailureCounts.Count; //Verify DataTable contains the same amount of rows. Debug.Assert(dTable.Rows.Count == totalExpected); } } } </code></pre> The above answer can be copied and pasted into a .cs file and run with the following code: <code>using Com.StackOverflow;</code> . <pre><code>SOQuestion__Add_two_arraylists_in_a_datatable.AnswerQuestionDirectly(); </code></pre>
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POAdd two arraylists in a datatable
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USJohn K
UserOwnerUserId
1. USJohn K
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. This table or related slice is empty.
CommentsPostId
1. This table or related slice is empty.

Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.