Trouble 1: Trying to use an SPWeb object that has been closed or disposed and is no longer valid

This code is error

Private void GetData()
{
    using (SPWeb ospWeb = SPContext.Current.Web)
     {
           //code here
     }
}

Replace code  here

Private void GetData()
{
     using(SPSite spSite=new SPSite(SPContext.Current.Web.Url))
     {
          using (SPWeb spWeb = spSite.OpenWeb())
            {
              //code here
            }
    }
}

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Trouble 2: Increate execution Timeout Issue for sharepoint 2007 and 2010

Default timeout of SharePoint is 6 minutes (360 seconds)

Solution:

Find to path to open file web.config

Sharepoint 2007

C:\Program Files\Common Files\Microsoft Shared\web server extensions\12\TEMPLATE\LAYOUTS

Sharepoint 2010

C:\Program Files\Common Files\Microsoft Shared\web server extensions\14\TEMPLATE\LAYOUTS

Open file: web.config

Sample Web.Config

Sharepoint 2007: edit 360 (6 second) to 7 or 8 seconds …

<system.web>
    <compilation batch="false" batchTimeout="600" maxBatchSize="10000" maxBatchGeneratedFileSize="10000" />
    <httpHandlers>
      <add verb="*" path="*.aspx" type="System.Web.UI.PageHandlerFactory, System.Web, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" />
    </httpHandlers>
    <customErrors mode="On" />
<httpRuntime executionTimeout="360" />
    <globalization fileEncoding="utf-8" />
  </system.web>

Sharepoint 2010: edit 360 (6 second) to 7 or 8 seconds …

<system.web>

    <compilation batch="false" batchTimeout="600" maxBatchSize="10000" maxBatchGeneratedFileSize="10000" />

    <customErrors mode="On" />

    <httpRuntime executionTimeout="360" />

    <globalization fileEncoding="utf-8" />

  </system.web>

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Trouble 3: If you have permission, you can use this page to temporarily close Web Parts or remove personal settings. For more information, contact your site administrator

Step 1: After add web part, you click button Export …

Step 2: Appear error below

Step 3: Because permission of system, you can edit “trust level” in file web.config with path to port contain your web application (Ex: C:\inetpub\wwwroot\wss\VirtualDirectories\80)

Step 4: Find “trust level” and change “WSS_Minimal” to “Full” and save file.

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Trouble 4: Display Save Site As Template in sharepoint 2010

Step 1: Open your site | Click Site Action | Site Setting

Step 2: You want to Save site as template, but you don’t see it in categories Site Action

Step 3: It is easy, click to Manage site features

Step 4: find feature Sharepoint Server Publishing and Deactive it

Step 5: Click Deactive this feature

Step 6: Now,  you can see Save site as template link

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Trouble 5: The list cannot be displayed in Datasheet view

Error 1

Or Error 2

Solution: download component at here and setup it

2007 Office System Driver: Data Connectivity Components

Choose your list and click tab List then click Ribbon Button “DataSheet View”

Result as

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Trouble 6: Error occurred in deployment step ‘Recycle IIS Application Pool’

When deploy webpart, you see error follow as:

Solution:

Open central admin | Application management | click to “Change site collection administrators”

You see administrator is quochung and admin, but current have not user quochung, administrator is available, so can change any user to administrator

Change admin to administrator for site collection administrator.

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