In this article we will be understanding the procedure to upload a file into "Documents" using a Visualforce Page. You can upload a file and save it as an attachment against a record i believe, but i am not sure how to do this. Hence, this topic would only cover uploading a file to "Documents" under a folder you desire.

I actually had to upload a file against a record. I uploaded the file into Documents, and then stored the reference of the file as a Field in the record. This way i can access the document from the record directly at a later point.

<apex:inputfile> is the tag that is used to upload a file.

Code Sample:

Create the following Visualforce Page

<apex:page controller="UploadDoc">
<apex:form>
  <apex:sectionHeader title="Upload a Document into Salesforce"/>
  <apex:pageblock>
      <apex:pageblocksection columns="1">
          <apex:inputfile value="{!myimage.body}" filename="{!myimage.Name}" />
          <apex:commandbutton value="Save" action="{!Savedoc}"/>
      </apex:pageblocksection>
  </apex:pageblock>   
</apex:form> 
</apex:page>

The controller would be named "UploadDoc" and will have the following code

public class UploadDoc
{
Public Document mydoc;
    Public Document getmyimage()
    {
        mydoc = new Document();
        return mydoc;
    }
   
    Public Pagereference Savedoc()
    {
        mydoc.folderid = UserInfo.getUserId(); // Stores in the currennt users "My Personal Documents" folder
        //mydoc.folderid = 'any other id you want here'; // Fetch Id dynamically by using [Select Id from Folder where Name='My Images']. Specifying a FolderId is mandatory
        insert mydoc;
        return NULL;
    }   
       
       
}