I have used the following code for folder creation only in document library via list item creation workflow
SPListItem CurItem =
workflowProperties.Item;
SPSite MySite = new SPSite(workflowProperties.WebUrl);
SPWeb Myweb = MySite.OpenWeb();
SPDocumentLibrary spdoclibrary = (SPDocumentLibrary)Myweb.Lists["My Documents"];
Myweb.Folders.Add(workflowProperties.WebUrl + "/My%20Documents/" + CurItem["Title"].ToString());
spdoclibrary.Update();
Another Way:-
SPList splstDoc = Myweb.Lists["My
Documents"];
SPFolderCollection folderColl = splstDoc.RootFolder.SubFolders;
SPFolder newFolder =
folderColl.Add(workflowProperties.WebUrl + "/My%20Documents/"
+ CurItem["Title"].ToString());
I have used the following code for file along with properties creation in document library via list item creation workflow
Hashtable objhash = new Hashtable();
byte[] byt = new byte[Convert.ToInt32(FileUpload1.PostedFile.ContentLength)];
objhash.Add("custom
field name", "value");
SPFolder myfolder =
Myweb.GetList(workflowProperties.WebUrl + "/My%20Documents/").RootFolder;
myfolder.Files.Add("Test.txt",
byt, objhash, false);
myfolder.Update();
I have used the following code for folder along with properties creation in document library via list item creation workflow
SPFolder myfolder =
Myweb.GetFolder(workflowProperties.WebUrl + "/My%20Documents/");
SPFolder spfolder =
myfolder.SubFolders.Add(workflowProperties.WebUrl + "/My%20Documents/"
+ CurItem["Title"].ToString());
spfolder.Item["Title"]
= "Aasai";
spfolder.Item["Test"]
= "Aasai";
spfolder.Item.SystemUpdate(false);