Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
?
Solved

Line meaning

Posted on 2016-08-25
9
Medium Priority
?
135 Views
Last Modified: 2016-08-26
Hi,
What is the meaning of this?
IEnumerable<DocumentFormat.OpenXml.Spreadsheet.Column> ic = cs.Elements<DocumentFormat.OpenXml.Spreadsheet.Column>().Where(r => r.Min == columnIndex).Where(r => r.Max == columnIndex);

Open in new window

0
Comment
Question by:HuaMinChen
  • 5
  • 4
9 Comments
 
LVL 143

Assisted Solution

by:Guy Hengel [angelIII / a3]
Guy Hengel [angelIII / a3] earned 2000 total points
ID: 41771242
This is the variable, of the given type, that is getting assigned to the result of the LINQ expression that follows. the reason of the IEnumerable is because of the LINQ returns a collection, with eventually only 1 (or 0 items) in it
IEnumerable<DocumentFormat.OpenXml.Spreadsheet.Column> ic =

this is the collection from where the LINQ will "filter" from ...
cs.Elements<DocumentFormat.OpenXml.Spreadsheet.Column>()

... applying the 2 conditions, saying the processed item (from the above collection) is named r, and making a test on r.<someproperty> == <somevariable>
.Where(r => r.Min == columnIndex)
.Where(r => r.Max == columnIndex);
if the condition on "r" is fulfilled, the object will be returned into the result collection
0
 
LVL 11

Author Comment

by:HuaMinChen
ID: 41771279
Many thanks Hengel.
Is it returning one array per relevant spreadsheet columns, by such line?

What is the purpose to 'care' about only 'First()' below?
                                                    IEnumerable<DocumentFormat.OpenXml.Spreadsheet.Column> ic = cs.Elements<DocumentFormat.OpenXml.Spreadsheet.Column>().Where(r => r.Min == columnIndex).Where(r => r.Max == columnIndex);
                                                    if (ic.Count() > 0)
                                                    {
                                                        DocumentFormat.OpenXml.Spreadsheet.Column c = ic.First();
                                                        double cc = c.Width;
                                                        sw.WriteLine("Cell width: {0}", cc.ToString());
                                                    }

Open in new window

0
 
LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 41771294
First() returns what the name is suggesting: the first (and eventually the only) item from the collection.
this avoids to "loop" on the collection.
0
Restore individual SQL databases with ease

Veeam Explorer for Microsoft SQL Server delivers an easy-to-use, wizard-driven interface for restoring your databases from a backup. No expert SQL background required. Web interface provides a complete view of all available SQL databases to simplify the recovery of lost database

 
LVL 11

Author Comment

by:HuaMinChen
ID: 41771302
To the original line, why does it need to check both Min and Max in there?
0
 
LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 41771337
I don't know. that is the application logic presumably
it surely tries to consider only cells that are not merged, and at exaclty that position
0
 
LVL 11

Author Comment

by:HuaMinChen
ID: 41771352
Is such line only destined to check for non-merged cell? How to detect that relevant cell is a merged cell?
0
 
LVL 143

Accepted Solution

by:
Guy Hengel [angelIII / a3] earned 2000 total points
ID: 41771372
Please refer to the documentation, which is really complete on that topic:
DocumentFormat.OpenXml.Spreadsheet.Column

it's not "merged column", in this regards, but a column "info" that only applies to that requested column, ignoring hence any other "info" that would apply to more columns, even if the requested column would be included.

if you wanted to return "all" the colum "info" object that cover the requested column:

.Where(r => r.Min <= columnIndex)
.Where(r => r.Max >= columnIndex);
0
 
LVL 11

Author Comment

by:HuaMinChen
ID: 41771376
Thanks a lot Hengel. Where is the documentation located at?
0
 
LVL 143

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 41771406
sorry, I had not pasted the URL above:
https://msdn.microsoft.com/en-us/library/documentformat.openxml.spreadsheet.column(v=office.14).aspx

you can find such information really quickly, using google, you search this:
DocumentFormat.OpenXml.Spreadsheet.Column site:microsoft.com
0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Whether you’re a college noob or a soon-to-be pro, these tips are sure to help you in your journey to becoming a programming ninja and stand out from the crowd.
High user turnover can cause old/redundant user data to consume valuable space. UserResourceCleanup was developed to address this by automatically deleting user folders when the user account is deleted.
The goal of this video is to provide viewers with basic examples to understand how to create, access, and change arrays in the C programming language.
Viewers will learn how to properly install Eclipse with the necessary JDK, and will take a look at an introductory Java program. Download Eclipse installation zip file: Extract files from zip file: Download and install JDK 8: Open Eclipse and …
Suggested Courses

580 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question