SharePoint 文档库的默认 OOBX EditForm 消失

Question

SharePoint 文档库的默认 OOBX EditForm 消失。我们尝试在 SharePoint 设计器中创建新的编辑表单，但出现无法将列表更改保存到服务器的错误。 然后尝试另一种方法，转到所有文件/文档库/表单 - 这里出现 list view threshold 错误。我们库中有超过 1 万个项目，无法打开表单文件夹。

请告知如何取回默认的编辑表单。

Answer 1

您需要通过 PowerShell 来完成：

$webpartTemplate = @"
<WebPart xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.microsoft.com/WebPart/v2">
    <Assembly>Microsoft.SharePoint, Version=16.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c</Assembly>  
    <TypeName>Microsoft.SharePoint.WebPartPages.ListFormWebPart</TypeName>
    <ListName xmlns="http://schemas.microsoft.com/WebPart/v2/ListForm">{{{LIST_ID}}}</ListName>
    <ListId xmlns="http://schemas.microsoft.com/WebPart/v2/ListForm">{{LIST_ID}}</ListId>
    <PageType xmlns="http://schemas.microsoft.com/WebPart/v2/ListForm">{{PAGE_TYPE}}</PageType>
    <FormType xmlns="http://schemas.microsoft.com/WebPart/v2/ListForm">{{FORM_TYPE}}</FormType>
    <ControlMode xmlns="http://schemas.microsoft.com/WebPart/v2/ListForm">{{CONTROL_MODE}}</ControlMode>
    <ViewFlag xmlns="http://schemas.microsoft.com/WebPart/v2/ListForm">1048576</ViewFlag>
    <ViewFlags xmlns="http://schemas.microsoft.com/WebPart/v2/ListForm">Default</ViewFlags>
    <ListItemId xmlns="http://schemas.microsoft.com/WebPart/v2/ListForm">0</ListItemId>
</WebPart>
"@

Function Create-DefaultListForm
{
    param(
        [parameter(Mandatory=$true)]$List, 
        [parameter(Mandatory=$true)][string]$FormUrl, 
        [parameter(Mandatory=$true)][ValidateSet("Display", "Edit", "New")]$FormType
    )

    begin { }    
    process
    {

        $webpartXml = $webpartTemplate -replace "{{LIST_ID}}", $List.Id.ToString()

        switch ($FormType)
        {
            "Display" { 
                $webpartXml = $webpartXml -replace "{{PAGE_TYPE}}", "PAGE_DISPLAYFORM" 
                $webpartXml = $webpartXml -replace "{{FORM_TYPE}}", "4"  
                $webpartXml = $webpartXml -replace "{{CONTROL_MODE}}", "Display"  
                break;
            }
            "Edit" { 
                $webpartXml = $webpartXml -replace "{{PAGE_TYPE}}", "PAGE_EDITFORM" 
                $webpartXml = $webpartXml -replace "{{FORM_TYPE}}", "6"  
                $webpartXml = $webpartXml -replace "{{CONTROL_MODE}}", "Edit"  
                break;
            }
            "New" { 
                $webpartXml = $webpartXml -replace "{{PAGE_TYPE}}", "PAGE_NEWFORM" 
                $webpartXml = $webpartXml -replace "{{FORM_TYPE}}", "8"  
                $webpartXml = $webpartXml -replace "{{CONTROL_MODE}}", "New"  
                break;
            }
        }

        try
        {           
            #Check if form page already exists
            $listPages = Get-PnPProperty -ClientObject $List.RootFolder -Property Files
            $formPage = $listPages | Where-Object { $_.ServerRelativeUrl.ToLower() -eq $FormUrl.ToLower() }

            if ($null -eq $formPage) {
                Write-Output "  [Creating Form Page] $FormUrl"

                #Create Form
                Remove-PnPFile -ServerRelativeUrl $FormUrl -Force
                $formPage = $List.RootFolder.Files.AddTemplateFile($FormUrl, [Microsoft.SharePoint.Client.TemplateFileType]::FormPage)            
            }
            else {
                #Form page exists, check if form is recognized by list (i.e. form page has a form webpart on it)
                $listForms = Get-PnPProperty -ClientObject $List -Property Forms

                if ($null -ne $listForms -and $listForms.Count -gt 0) {
                    $existingForm = $list.Forms | Where-Object { $_.ServerRelativeUrl.ToLower() -eq $FormUrl.ToLower() }
                    if ($null -ne $existingForm) {
                        Write-Warning "  [Form Already Exists] $FormUrl"
                        return;
                    }                
                }
            }

            Write-Output "  [Adding Form Webpart] $FormUrl"
            #Get Webpart Manager for Form
            $wpm = $formPage.GetLimitedWebPartManager([Microsoft.SharePoint.Client.WebParts.PersonalizationScope]::Shared)

            #Import Webpart on page
            $wp = $wpm.ImportWebPart($webpartXml)

            #Add webpart to Form
            $wpm.AddWebPart($wp.WebPart, "Main", 1) | Out-Null

            #Execute changes
            $List.Context.ExecuteQuery()                    
        }
        catch
        {
            Write-Error "Error creating form $FormType at $FormUrl. Error: $($_.Exception)"
        }
    }
    end { }
}

使用类似这样的脚本。如果你只需要恢复EditForm，那么你显然可以跳过下面的Upload、New和DispForms：

    Connect-PnPOnline -Url $problemSiteUrl -UseWebLogin
    $list = Get-PnPList $problemlistTitle
    $listUrl = $list.RootFolder.ServerRelativeUrl

    # Handle Document Library Types
    if ($list.BaseType -eq [Microsoft.SharePoint.Client.BaseType]::DocumentLibrary) {
        Write-Host " > Processing Library: $listUrl"
        Create-DefaultListForm -List $list -FormUrl "$listUrl/Forms/Upload.aspx"   -FormType New
        Create-DefaultListForm -List $list -FormUrl "$listUrl/Forms/DispForm.aspx" -FormType Display
        Create-DefaultListForm -List $list -FormUrl "$listUrl/Forms/EditForm.aspx" -FormType Edit
    }

    # Handle Generic List Types
    else {
        Write-Host " > Processing List: $listUrl"
        Create-DefaultListForm -List $list -FormUrl "$listUrl/NewForm.aspx"  -FormType New
        Create-DefaultListForm -List $list -FormUrl "$listUrl/DispForm.aspx" -FormType Display
        Create-DefaultListForm -List $list -FormUrl "$listUrl/EditForm.aspx" -FormType Edit
    }

如果您只需要编辑表单，请像这样使用Create-DefaultListForm 函数：

    Connect-PnPOnline -Url 'UrlOfProblemSite' -UseWebLogin
    $list = Get-PnPList 'TitleOfTheProblemLibraryHere'
    $listUrl = $list.RootFolder.ServerRelativeUrl

    Create-DefaultListForm -List $list -FormUrl "$listUrl/Forms/EditForm.aspx" -FormType Edit