Comment enlever/supprimer une colonne dans une liste personnalisée que vous avez ajouté de site existant colonnes?

En plus d'être Scellé, un champ peut être en lecture seule, caché et etc. Tous ces facteurs pourraient empêcher le domaine de la suppression. La méthode plus appropriée pour supprimer un champ de la liste est la suivante:

public static bool RemoveField(SPField spField)
{
if (spField == null)
{
WriteErrorToLog("spField is null! Please, provide a valid one");
return false;
}
bool res = false;
try
{
//check if it's a ReadOnly field.
//if so, reset it
if (spField.ReadOnlyField)
{
spField.ReadOnlyField = false;
spField.Update();
}
//check if it's a Hidden field.
//if so, reset it
if (spField.Hidden)
{
spField.Hidden = false;
spField.Update();
}
//check if the AllowDeletion property is set to false.
//if so, reset it to true
if (spField.AllowDeletion == null || !spField.AllowDeletion.Value)
{
spField.AllowDeletion = true;
spField.Update();
}
//If the AllowDeletion property is set,
//the Sealed property seems not to be examined at all.
//So the following piece of code is commented.
/*if(spField.Sealed)
{
spField.Sealed = false;
spField.Update();
}*/
//If the AllowDeletion property is set,
//the FromBaseType property seems not to be examined at all.
//So the following piece of code is commented.
/*if(spField.FromBaseType)
{
spField.FromBaseType = false;
spField.Update();
}*/
//finally, remove the field
spField.Delete();
spField.ParentList.Update();
res = true;
}
catch (Exception ex)
{
WriteErrorToLog(ex.Message);
}
return res;
}
public static bool RemoveField(SPList spList, string displayNameOrInternalNameOrStaticName)
{
SPField spField = GetFieldByName(spList, displayNameOrInternalNameOrStaticName);
if(spField == null)
{
WriteErrorToLog(string.Format("Couldn't find field {0}!", displayNameOrInternalNameOrStaticName));
return false;
}
return RemoveField(spField);
}
public static void WriteErrorToLog(string errorMsg)
{
//write error into log
}

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