From time to time, it may be necessary to remove or delete one or more fields from a single record. This post describes the formula to carry out this task.
When we work with data, there can sometimes be the requirement to delete or remove fields from a record.An example of where this can happen is in situations where we define a record that may contain 'working fields' to support the operation of an app. This could include temporary sequence number, or fields to support the appearance or presentation in the app.At the point at which we want to save the record to a data source, there may be the requirement to remove these extraneous fields so that we can pass the record to the Patch function.
When we work with tables of data, we can call the DropColumns function to drop columns from the table. When we work with a single record however, there's no equivalent function to drop fields from an individual record.To work around this limitation, one technique is to create a single row table that contains the record without the unnecessary columns and to extract the first record from this table.
As an example, let's take the following formula that defines a record and stores it in a variable called varRecord.
Set[varRecord, { Forename:"Tim", Surname:"Leung", Address:"10 Kings Road", City:"London", UpdateDatabase:true, SequenceNo:5 }] The definition of this record contains two fields for use in our app - UpdateDatabase and SequenceNo.To return the record without these two fields, we would use the following syntax.
First[ DropColumns[Table[varRecord], "UpdateDatabase", "SequenceNo" ]]We can then use this syntax to patch the record [without these two fields] to a data source. The syntax would look like this:
Patch[CustomerList, Defaults[CustomerList], First[ DropColumns[Table[varRecord], "UpdateDatabase", "SequenceNo" ]]
With Power Apps, there's no "DeleteFields" function to delete or remove fields from a single record. However, we can work around this limitation by transforming the record into a table, dropping the columns, and returning the first record from this table.
In this SharePoint tutorial, we will discuss how to delete all items from a SharePoint list using out of box feature as well as by using the SharePoint server object model. We will also see, how to delete all items from the SharePoint list using PowerShell.
There might have some situations where you want to delete all items from a larger list that may have more than thousands of items. We will also see, how to delete multiple items from the sharepoint list programmatically javascript.
In this example, we will discuss how to delete all items from a SharePoint list programmatically using the server object model.
protected void Page_Load[object sender, EventArgs e] { SPSite site = new SPSite[“//SiteURL”]; SPWeb web = site.OpenWeb[]; web.AllowUnsafeUpdates = true;
SPList list = web.Lists[List Name];
DeleteAllRerecords[list]; web.Update[];
}
void DeleteAllRerecords[SPList list] { SPListItemCollection items = list.Items; for [int i = items.Count 1; i >= 0; i] { items[i].Delete[]; }
}
This is how we can delete all items from a SharePoint list programmatically using SharePoint server object model code.
Complete SharePoint Training Course Just for $199 [Just for Today]
Let us see, how to delete all items from sharepoint list using jsom. The below code will work to delete multiple items from sharepoint list programmatically javascript.
Also, we will see, how to delete a list item by id using the javascript object model [jsom] in SharePoint Online or SharePoint 2013/2016/2019.
Here we will see, how to delete all SharePoint list items using the JavaScript object model [jsom] in SharePoint Online Office 365. I have used to code inside a script editor web part inside a web part page in SharePoint.
Code:
$[document].ready[function[]{ $[“#btnDeleteItems”].click[function[]{ DeleteAllItems[]; }];
}];
function DeleteAllItems[]{ var ctx = SP.ClientContext.get_current[], list = ctx.get_web[].get_lists[].getByTitle[‘Ideas’], query = new SP.CamlQuery[], items = list.getItems[query]; ctx.load[items, “Include[Id]”]; ctx.executeQueryAsync[function [] { var enumerator = items.getEnumerator[], itemArray = []; while [enumerator.moveNext[]] { itemArray.push[enumerator.get_current[]];
}
for [var s in itemArray] { itemArray[s].deleteObject[]; } ctx.executeQueryAsync[]; }]; }
This will delete all items from the SharePoint Online list using jsom [JavaScript object model].
Delete all items from SharePoint online list using JavaScript object model
This is another way we can delete all items from a list using JavaScript object model [jsom] in SharePoint Online Office 365. The same code we can use to delete all items from SharePoint 2016 and SharePoint 2013 list.
Here in the CAML query, we are passing the RowLimit as 100, you can provide as per the requirement.
The below code we are putting inside a script editor web part which we have put inside a web part page.
$[function [] { bindButtonClick[]; }]; function bindButtonClick[] { $[“#btnSubmit”].on[“click”, function [] { deleteAllItemsFromList[]; }];
}
var clientContext; var website; var oList;
var cnt = 0;
function deleteAllItemsFromList[] { clientContext = SP.ClientContext.get_current[]; website = clientContext.get_web[];
oList = website.get_lists[].getByTitle[‘SourceList’];
var camlQuery = new SP.CamlQuery[]; camlQuery.set_viewXml[‘100’];
this.collListItem = oList.getItems[camlQuery];
clientContext.load[website]; clientContext.load[collListItem, ‘Include[Id]’]; clientContext.executeQueryAsync[Function.createDelegate[this, this.onQuerySucceeded], Function.createDelegate[this, this.onQueryFailed]];
}
function onQuerySucceeded[sender, args] { var listItemInfo = “; var listItemEnumerator = collListItem.getEnumerator[]; while [listItemEnumerator.moveNext[]] { var oListItem = listItemEnumerator.get_current[]; var ID = oListItem.get_id[]; var oListItemDel = oList.getItemById[ID]; oListItemDel.deleteObject[]; clientContext.executeQueryAsync[Function.createDelegate[this, this.onDeleteSucceeded], Function.createDelegate[this, this.onDeleteFailed]]; }
}
function onQueryFailed[sender, args] { alert[‘Failed’];
}
function onDeleteFailed[sender, args] { alert[‘Failed’];
}
function onDeleteSucceeded[sender, args] { cnt = cnt + 1; alert[‘Delete success : ‘ + cnt]; }
Once you will save the code and click on the button to delete, it will display an alert on each item delete like below:
The above code, we can use to delete multiple items from sharepoint list programmatically javascript.
If you open the list to delete all the items then you have to select all the items individually to delete. But if your list has more than thousands of items then it will be difficult to do this process. But you can do it in the simplest approach.
Open the site and then click on the settings icon and then click on Site Settings. Then on the Site Settings page click on the Content and structure link under Site Administration section like below:
Then from the Site Content and Structure page, Select the particular list whose items you wants to delete like below:
Then from the right-hand side click on the icons [shown in the yellow color] to select all the items and then click on the Delete option from the Actions button like below:
This way you can delete all the items from the list.
For IE Browser:
If you are using IE browser, then first open the list view settings and then go to the Tabular View section in the down and select the checkbox Allow individual item checkboxes .
Now you open the list and select the tick box [selected in yellow color] to select all the item like below:
Now, we will discuss how to delete all list items using PowerShell in SharePoint 2013. The same PowerShell script we can use to delete all list items in SharePoint 2016.
We can write PowerShell script in Windows PowerShell ISE or you can use Visual studio code to write, debug and test PowerShell scripts.
Below is the PowerShell script. Open SharePoint Management Shell and run below PowerShell command.
I have a list name as MyTestList99 which has the below items. I want to delete all items using PowerShell.
$web = Get-SPweb “//win-pfcp2dgt8di/sites/EnjoySharePoint/” $list = $web.Lists[“MyTestList99”] $items = $list.items foreach [$item in $items] { $deleteitem=$list.GetItemById[$item.ID] $deleteitem.Delete[]
}
After running above command, if you will refresh the SharePoint list, you will not get any item in it.
This is how we can delete all SharePoint list items using PowerShell. The same code will work for SharePoint 2013/2016.
Now, we will see, how to delete list items in SharePoint Online Office 365 using the Client Side Object Model [CSOM] with PowerShell. If you have more items to delete from SharePoint List, we can go for batch delete.
I would like to highlight programmatically when we delete list items, those are not moved to the Recycle Bin for the SharePoint site.
Please find the below code which will delete all items from the SharePoint list, the PowerShell script is hared by Sambita.
cls Add-Type -Path “E:PSDLLMicrosoft.SharePoint.Client.dll” Add-Type -Path “E: PSDLLMicrosoft.SharePoint.Client.Runtime.dll” $0 = $MyInvocation.MyCommand.Definition $dp0 = [System.IO.Path]::GetDirectoryName[$0] $url = “//onlysharepoint2013.sharepoint.com/sites/test123/” $username = “[emailprotected]” $password = “*****” $securePassword = ConvertTo-SecureString $password -AsPlainText -Force #connect/authenticate to sharepoint online and get ClientContext object $clientContext = New-Object Microsoft.SharePoint.Client.ClientContext[$url] $credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials[$username, $securePassword] $clientContext.Credentials = $credentials if[!$clientContext.ServerObjectIsNull.Value] { $web = $clientContext.Site.RootWeb $clientContext.Load[$web] $clientContext.ExecuteQuery[] $list=$clientContext.Web.Lists.GetByTitle[TestList] $clientContext.Load[$list] $clientContext.ExecuteQuery[] $query = New-Object Microsoft.SharePoint.Client.CamlQuery $query.ViewXml=”1000” $items=$list.GetItems[$query] $clientContext.Load[$items]
$clientContext.ExecuteQuery[]
if [$items.Count -gt 0] { for [$i = $items.Count-1; $i -ge 0; $i] { $items[$i].DeleteObject[] } $clientContext.ExecuteQuery[] }
}
This is how we can delete all items from a SharePoint Online list using PowerShell.
You may like the following SharePoint tutorials:
- SharePoint 2013/2016/Online: Find an Item List search box does not return results
- The current page has been customized from its template. Revert to template SharePoint
- Redirect to a different page after adding new list items in SharePoint
- Create, Update, Delete and Display List items using JavaScript Object Model [JSOM] in SharePoint
- Reset SharePoint List Item ID
- How to add attachment to SharePoint list item programmatically
- How to display SharePoint list items in a table using SPFX
- How to customize a SharePoint List form
In this SharePoint tutorial, we learned, how to delete all items from a SharePoint list using the SharePoint server object model. Also, we saw how to delete all items from a SharePoint list using PowerShell and browser. And how to delete multiple items from sharepoint list programmatically javascript.
I am Bijay from Odisha, India. Currently working in my own venture TSInfo Technologies in Bangalore, India. I am Microsoft Office Servers and Services [SharePoint] MVP [5 times]. I works in SharePoint 2016/2013/2010, SharePoint Online Office 365 etc. Check out My MVP Profile.. I also run popular SharePoint web site SPGuides.com
Video liên quan