Tag: Issues

Add code behind to SharePoint 2013 master page

One way is to add delegate control to master page. Follow the article: http://www.sharepointpals.com/post/Step-by-step-procedures-to-create-a-delegate-control-in-SharePoint-2010

However for some reason, it’s required to set ControlSrc to “~/_ControlTemplates/15/…” or else the control won’t be used.

Filter by taxonomy column in SharePoint 2013 REST API

C# String problems

When retrieving HTML or string content from some editors such as SharePoint editor, the editor may insert zero-width or control characters in the content that can cause problem methods like string.IndexOf, string.Compare, string.Replace etc.

If the application only uses English language, it’s possible to strip all control characters from the data before doing other string operations.

Use the Regex to do so

data = Regex.Replace(data, @”[^x20-x7F]”, “”);

This line will remove all characters that are not in the range 0x20 to 0x7F in the ASCII table.

Then proceed to do string operations as per normal.

Read DateTime data from Excel file using C#

Excel files are very tricky to deal with, sometimes it returns double value, sometimes just plain string.

The example processes values read by EPPlus, might be useful in other situations, too.

public DateTime GetDate(object valFromExcel)
{
if(valFromExcel is DateTime) return valFromExcel;
if(valFromExcel is double) return DateTime.FromOADate((double)valFromExcel);
return Convert.ToDateTime(valFromExcel);
}

Deployment stuck at deploying in Sharepoint Solutions Manager

From Central Admin, go to  System Settings > Manage Farm Solutions, then “stop” the deployment of the WSP from there.
Before deploying the solution using central admin, make sure that the sptimer service and sp web services root application pool is running on all servers (WFE and APP)
The reason why it got stuck is that it couldn’t complete the deployment on one or more servers. Make sure that all the servers are accessible and have enough space.

Read SharePoint workflow status in JavaScript

Source: http://sharepoint.stackexchange.com/questions/94648/sharepoint-2013-check-workflow-status-programmatically-javascript

var context = new SP.ClientContext.get_current();
  var web = context.get_web();
  var list = web.get_lists().getByTitle(listTitle);
  var listItem = list.getItemById(listItemId);  
  context.load(listItem);
  context.executeQueryAsync(
     function() {
       var workflowStatusField = listItem.get_parentList().get_fields().getByTitle(workflowTitle); //get workflow status field
       var workflowStatusValue = listItem.get_item(workflowTitle); //get workflow status field value
       success(workflowStatusValue);
     },
     error
  );

RequiredFieldValidator and DropDownList intial value

The RequiredFieldValidator complains if the value of the dropdown list is unchanged even though you may have some default value set programmatically.

To solve this, set InitialValue to the required field validator.

If you set a default value to a dropdown list and then disable the dropdown list, the validator will not work correctly. Use a hidden field and use javascript to update it every time the dropdown list’s value is changed, then configure the validator to check the hidden field instead.

UpdatePanel in Sharepoint

Apparently UpdatePanel doesn’t work in SharePoint because reasons.

To get it to work, you have to jump through hoops by downloading the SharePoint guidance library thingy as some source code and build it yourself, then deploy it to the GAC of your environment, then add reference to Microsoft.Practice.SPG.AjaxSupport.dll, then use a SafeScriptManager in the usercontrol of your SharePoint webpart.

Maybe it’s better to build the thing using pure HTML and javascript?