C# – How to loop through all webs and sub webs of a SharePoint Web

asp.netcsharepointsharepoint-2010sharepoint-2013

I am trying to loop through all webs and subs-webs of those webs under a web.

My Parent web

http://EXAMPLE.com/parentweb (This is a sub site not a root web)

sub webs
http://example.com/parentweb/subweb ( This is one of the sub web which may or may not have sub webs)

The only thing i tried is go to the site collection and loop throug all webs which is much longer process because i know the only sub site that needs to be checked. my site collection has multiple sub sites. i don't want to loop through all subs sites.

This code works but it takes so much of time and it loops through all subsites which don't need to be checked

     using(SPSite site = new SPSite(“http://myserver/mysitecol”) 
           { 
               foreach(SPWeb web in site.AllWebs) 
               {
               }
           }

Best Answer

You can use the .Webs property of an SPWeb object to access its direct child subsites.

using(SPSite site = new SPSite("http://myserver/mysitecol") 
{ 
    using(SPWeb parentweb = site.OpenWeb("subweb/subweb") 
    {
        foreach(SPWeb web in parentweb.Webs)
        {

        }
    }
}

To access all (including indirect) descendant child sites below a Web, you could access that .Webs property recursively on each direct descendent, but it would be more straightforward to start with the .AllWebs property of the SPSite site collection object.

The .WebsInfo property of the SPWebCollection returned by .AllWebs gives you a List<> of lightweight SPWebInfo objects. You can use this lightweight collection to get a filtered list of the Webs you care about without having to instantiate and dispose of any of the other SPWebs in the collection.

string webUrl = "/mysitecol/subweb/subweb";
using(SPSite site = new SPSite("http://myserver/mysitecol") 
{ 
    List<SPWebInfo> websInfo = site.AllWebs.WebsInfo.FindAll(
        delegate(WebsInfo webInfo)
        {
            // filter to get us only the webs that start with our desired URL
            return webInfo.ServerRelativeUrl.StartsWith(webUrl);
        }
    );
    foreach(SPWebInfo webInfo in websInfo)
    {
         using(SPWeb web = site.OpenWeb(webInfo.Id))
         {

         }
    }
}

Related Solutions

C# – How to create an Excel (.XLS and .XLSX) file in C# without installing Microsoft Office

You can use a library called ExcelLibrary. It's a free, open source library posted on Google Code:

ExcelLibrary

This looks to be a port of the PHP ExcelWriter that you mentioned above. It will not write to the new .xlsx format yet, but they are working on adding that functionality in.

It's very simple, small and easy to use. Plus it has a DataSetHelper that lets you use DataSets and DataTables to easily work with Excel data.

ExcelLibrary seems to still only work for the older Excel format (.xls files), but may be adding support in the future for newer 2007/2010 formats.

You can also use EPPlus, which works only for Excel 2007/2010 format files (.xlsx files). There's also NPOI which works with both.

There are a few known bugs with each library as noted in the comments. In all, EPPlus seems to be the best choice as time goes on. It seems to be more actively updated and documented as well.

Also, as noted by @АртёмЦарионов below, EPPlus has support for Pivot Tables and ExcelLibrary may have some support (Pivot table issue in ExcelLibrary)

Here are a couple links for quick reference:
ExcelLibrary - GNU Lesser GPL
EPPlus - GNU (LGPL) - No longer maintained
EPPlus 5 - Polyform Noncommercial - Starting May 2020
NPOI - Apache License

Here some example code for ExcelLibrary:

Here is an example taking data from a database and creating a workbook from it. Note that the ExcelLibrary code is the single line at the bottom:

//Create the data set and table
DataSet ds = new DataSet("New_DataSet");
DataTable dt = new DataTable("New_DataTable");

//Set the locale for each
ds.Locale = System.Threading.Thread.CurrentThread.CurrentCulture;
dt.Locale = System.Threading.Thread.CurrentThread.CurrentCulture;

//Open a DB connection (in this example with OleDB)
OleDbConnection con = new OleDbConnection(dbConnectionString);
con.Open();

//Create a query and fill the data table with the data from the DB
string sql = "SELECT Whatever FROM MyDBTable;";
OleDbCommand cmd = new OleDbCommand(sql, con);
OleDbDataAdapter adptr = new OleDbDataAdapter();

adptr.SelectCommand = cmd;
adptr.Fill(dt);
con.Close();

//Add the table to the data set
ds.Tables.Add(dt);

//Here's the easy part. Create the Excel worksheet from the data set
ExcelLibrary.DataSetHelper.CreateWorkbook("MyExcelFile.xls", ds);

Creating the Excel file is as easy as that. You can also manually create Excel files, but the above functionality is what really impressed me.

R – Sharepoint: is performance of iteration through all subsites bearable

That is a very common method of performing looping of sites and web parts.

Speed with 100 sub-sites will not be a problem. It is really quick, if you do alot of processing that can slow it down.

The one thing to watch is the disposal of items if you leave the open or don't close you can suck all the memory from the WFE, especially if alot of users reload the page at the same time. See http://www.sharepointnutsandbolts.com/2008/06/disposing-sharepoint-objects-what-they.html and http://blogs.msdn.com/rogerla/archive/2008/02/12/sharepoint-2007-and-wss-3-0-dispose-patterns-by-example.aspx for examples they also have the disposal tool at http://blogs.msdn.com/sharepoint/archive/2008/11/12/announcing-spdisposecheck-tool-for-sharepoint-developers.aspx

Best Answer

Related Solutions

C# – How to create an Excel (.XLS and .XLSX) file in C# without installing Microsoft Office

R – Sharepoint: is performance of iteration through all subsites bearable

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