How to get currently logged-in user in workflow

        /// <summary>

        /// Get current user in workflow sharepoint context

        /// </summary>

        /// <param name="workflowProperties"></param>

        /// <returns></returns>

        public static SPUser GetCurrentUserInWorkflow(Microsoft.SharePoint.Workflow.SPWorkflowActivationProperties workflowProperties)

        {

            string ModifiedbyUserName = Convert.ToString(workflowProperties.Item.GetFormattedValue("Modified By"));

            string[] strChar = { "ID=" };

            string[] strChars = ModifiedbyUserName.Split(strChar, StringSplitOptions.None);

            Int32 iUserID = Convert.ToInt32(strChars[1].Substring(0, strChars[1].IndexOf("\"")));

            SPUserCollection usersInSite = workflowProperties.Web.SiteUsers;

            int countUsers = usersInSite.Count;

            for (int iCnt = 0; iCnt <= countUsers - 1; iCnt++)

            {

                if (usersInSite[iCnt].ID == iUserID)

                {

                    return workflowProperties.Web.SiteUsers[iCnt];

                }

            }

            return null;

        }

Refer from http://www.sharepointkings.com/2008/08/how-to-get-currently-logged-in-user-in.html

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Screenshot Pemission in Sharepoint 2007

Maybe these screenshot could make you easy understand permission in Sharpoint 2007
Figure - 01: Permission level

Figure - 01

Figure – 02: Built-in permission Sharepoint

Figure - 02

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Microsoft.SharePoint.SPFieldUserValueCollection is not marked as serializable

Problem:
Develop on SharePoint Workflow
Unexpected    System.Workflow.Runtime.Hosting.PersistenceException: Type 'Microsoft.SharePoint.SPFieldUserValueCollection' in Assembly 'Microsoft.SharePoint, Version=12.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c' is not marked as serializable.
Snippet code causes error:

public sealed partial class YourWorkflow : SharePointSequentialWorkflowActivity

    {

        SPFieldUserValueCollection _reviewers;

Resolve:
Check fields in your custom activity or workflow, if it has field type Microsoft.SharePoint.SPFieldUserValueCollection, just remove it or use it as variable method.

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HRESULT 0x80040E14 When Calling SPListItem.Update

Problem:
This is snippet code causes error HRESULT 0x80040E14 when calling SPListItem.Update method

SPList docApprovalList = _web.Lists[List.DocumentApprovalList];

SPListItem itemUpdate = docApprovalList.GetItemById(documentApprovalListObj.Id);

//itemUpdate[SPBuiltInFieldId._Identifier] = documentApprovalListObj.Id;

itemUpdate["ID"] = documentApprovalListObj.Id;

itemUpdate["Status"] = documentApprovalListObj.Status;

itemUpdate.Update();

documentApprovalListObj is my business object which has an attribute Id is a SharePoint List Field ID {1d22ea11-1e32-424e-89ab-9fedbadb6ce1}
Solve:
DO NOT change or re-assign value of field ID of list item

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How to create a User field that can contain more than one value

<Field ID="{44DB06B2-DC96-4dd7-AA6A-1A82AE906179}"

         Type="UserMulti"

         Name="Groups"

         DisplayName="Groups"

         ShowInEditForm="FALSE"

         Mult = "TRUE"

         Group="MyGruoup"/>

There are 2 notes:

• Type="UserMulti"
• Mult = "TRUE" - Upper TRUE!

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Restart attempt failed. iisreset /noforce

Problem:

Attempting stop...

Restart attempt failed.

The service did not respond to the start or control request in a timely fashion.

(2147943453, 8007041d)

Solution:

• Run services.msc
• Start World Wide Web Publishing Service service

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[ASP.NET] How to insert dynamically CSS to Web User Control

        /// 


        /// Override user control's method OnInit

        /// 

        /// Event arg object
        protected override void OnInit(EventArgs e)

        {

            /*base.OnInit(e);*/

            ////Define an HtmlLink control.

            HtmlLink myHtmlLink = new HtmlLink();

            myHtmlLink.Href = UrlFlexgridCss;

            myHtmlLink.Attributes.Add("rel", "stylesheet");

            myHtmlLink.Attributes.Add("type", "text/css");


            ////Add the HtmlLink to the Head section of the page.

            Page.Header.Controls.Add(myHtmlLink);

        }

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