SPFieldLookup.LookupList 属性
获取或设置标识此字段的值的源的列表的 GUID 的字符串表示形式。
命名空间: Microsoft.SharePoint
程序集: Microsoft.SharePoint(位于 Microsoft.SharePoint.dll 中)
语法
声明
Public Property LookupList As String
Get
Set
用法
Dim instance As SPFieldLookup
Dim value As String
value = instance.LookupList
instance.LookupList = value
public string LookupList { get; set; }
属性值
类型:System.String
标识的字段的信息的源的列表的 GUID 的字符串表示形式。如果字段中未指向列表,则返回空字符串。
异常
异常 | 条件 |
---|---|
SPException | 已设置该属性。LookupList属性设置后,您无法更改查阅列表。 |
备注
此属性返回的字符串表示形式的源列表中的ID属性。当您创建一个SPFieldLookup对象通过调用AddLookup或AddDependentLookup的SPFieldCollection对象列表的字段集合表示您要在其中添加查阅列时,将自动设置LookupList属性。
重要信息 |
---|
一旦建立查阅列,则不能更改目标列表。 |
示例
下面的示例是一个控制台应用程序枚举列表,查找类型SPFieldLookup的字段相关联的字段。当它找到该类型的字段时,该应用程序使用LookupList属性的值获取对查阅字段指向,并要获取目标中的字段的LookupField属性的值列表的查阅字段指向列表的引用。
using System;
using Microsoft.SharePoint;
namespace ConsoleApp
{
class Program
{
static void Main(string[] args)
{
using (SPSite siteCollection = new SPSite("https://localhost"))
{
using (SPWeb site = siteCollection.OpenWeb())
{
SPList list = site.Lists["Pending Orders"];
foreach (SPField item in list.Fields)
{
if (item is SPFieldLookup)
{
SPFieldLookup field = (SPFieldLookup)item;
if (!String.IsNullOrEmpty(field.LookupList) && !String.IsNullOrEmpty(field.LookupField))
{
// Is this the primary or secondary field for a list relationship?
string strRelationship = field.IsRelationship ? "Primary":"Secondary";
// Print the display name of the field.
Console.WriteLine("\nField: {0} ({1} Field)", field.Title, strRelationship);
// Is this a secondary field in a list relationship?
if (field.IsDependentLookup)
{
SPField primaryField = list.Fields[new Guid(field.PrimaryFieldId)];
Console.WriteLine("Primary Field: {0}", primaryField.Title);
}
// Get the site where the target list is located.
using (SPWeb targetSite = siteCollection.AllWebs[field.LookupWebId])
{
// Get the name of the list where this field gets information.
SPList targetList = targetSite.Lists[new Guid(field.LookupList)];
Console.WriteLine("Related list: {0}", targetList.Title);
// Get the name of the field where this field gets information.
SPField targetField = targetList.Fields.GetFieldByInternalName(field.LookupField);
Console.WriteLine("Related field: {0}", targetField.Title);
}
}
}
}
}
}
Console.Write("\nPress ENTER to continue...");
Console.ReadLine();
}
}
}
Imports System
Imports Microsoft.SharePoint
Module ConsoleApp
Sub Main()
Using siteCollection As New SPSite("https://localhost")
Using site As SPWeb = siteCollection.OpenWeb()
Dim list As SPList = site.Lists("Pending Orders")
For Each item As SPField In list.Fields
If TypeOf item Is SPFieldLookup Then
Dim field As SPFieldLookup = DirectCast(item, SPFieldLookup)
If Not String.IsNullOrEmpty(field.LookupList) AndAlso Not String.IsNullOrEmpty(field.LookupField) Then
' Is this the primary or secondary field for a list relationship?
Dim strRelationship As String = If(field.IsRelationship, "Primary", "Secondary")
' Print the display name of the field.
Console.WriteLine(vbLf & "Field: {0} ({1} Field)", field.Title, strRelationship)
' Is this a secondary field in a list relationship?
If field.IsDependentLookup Then
Dim primaryField As SPField = list.Fields(New Guid(field.PrimaryFieldId))
Console.WriteLine("Primary Field: {0}", primaryField.Title)
End If
' Get the site where the target list is located.
Using targetSite As SPWeb = siteCollection.AllWebs(field.LookupWebId)
' Get the name of the list where this field gets information.
Dim targetList As SPList = targetSite.Lists(New Guid(field.LookupList))
Console.WriteLine("Related list: {0}", targetList.Title)
' Get the name of the field where this field gets information.
Dim targetField As SPField = targetList.Fields.GetFieldByInternalName(field.LookupField)
Console.WriteLine("Related field: {0}", targetField.Title)
End Using
End If
End If
Next
End Using
End Using
Console.Write(vbLf & "Press ENTER to continue...")
Console.ReadLine()
End Sub
End Module