我正在使用核心服务创建多媒体组件，一切正常。但是，当我在创建多媒体组件的多媒体架构上定义元数据架构字段时，我会收到以下错误:-
无法找到http://www.tridion.com/ContentManager/5.0/DefaultMultimediaSchema:Metadata .
当我为多媒体组件提供默认多媒体架构的 TCM ID 时，会显示此消息。由于元数据字段保存在 Tridion 数据库中，因此我首先必须从代理检索这些字段，或者最好的解决方案是什么，请提出建议。下面是示例代码。如果有人知道为元数据字段提供默认值以及如何检索它们(有/没有查询代理数据库)，请修改它:-
public static string UploadMultiMediaComponent(string folderUri, string title, string schemaID)
{
core_service.ServiceReference1.SessionAwareCoreService2010Client client = new SessionAwareCoreService2010Client();
client.ClientCredentials.Windows.ClientCredential.UserName = "myUserName";
client.ClientCredentials.Windows.ClientCredential.Password = "myPassword"; client.Open();
ComponentData multimediaComponent = (ComponentData)client.GetDefaultData(
ItemType.Component, folderUri);
multimediaComponent.Title = title;
multimediaComponent.ComponentType = ComponentType.Multimedia;
multimediaComponent.Schema.IdRef =schemaID;
//multimediaComponent.Metadata = "";
StreamUpload2010Client streamClient = new StreamUpload2010Client();
FileStream objfilestream = new FileStream(@"\My Documents\images.jpg",
FileMode.Open, FileAccess.Read);
string tempLocation = streamClient.UploadBinaryContent("images.jpg",
objfilestream);
BinaryContentData binaryContent = new BinaryContentData();
binaryContent.UploadFromFile = tempLocation;
binaryContent.Filename = "images.jpg";
binaryContent.MultimediaType = new LinkToMultimediaTypeData()
{
// for jpg file
IdRef = "tcm:0-2-65544"
};
multimediaComponent.BinaryContent = binaryContent;
IdentifiableObjectData savedComponent = client.Save(multimediaComponent,
new ReadOptions());
client.CheckIn(savedComponent.Id, null);
streamClient.Close();
client.Close();
Console.WriteLine(savedComponent.Id);
//}
}
最佳答案
我不知道为什么你的代码不起作用，但以下代码对我有用
public static ComponentData GenerateMultiMediaComponent(TridionGeneration tridionGeneration, XmlData newsArticle, string componentName)
{
try
{
Dictionary<string, object> dicTridion = Common.GetTridionObject(tridionGeneration.client, ItemType.Component, tridionGeneration.Settings.ComponentFolderUri, componentName);
int objectCount = (int)dicTridion["count"];
SchemaFieldsData schemaFields = tridionGeneration.client.ReadSchemaFields(tridionGeneration.Settings.SchemaUri, true, new ReadOptions());
ComponentData componentData = (ComponentData)tridionGeneration.client.GetDefaultData(ItemType.Component, tridionGeneration.Settings.ComponentFolderUri);
if (schemaFields.Fields != null)
{
var fields = Fields.ForContentOf(schemaFields);
Helper.FillSchemaFields(tridionGeneration, fields);
componentData.Content = fields.ToString();
}
if (schemaFields.MetadataFields != null)
{
var metafields = Fields.ForMetadataOf(schemaFields, componentData);
Helper.FillSchemaFields(tridionGeneration, metafields);
componentData.Metadata = metafields.ToString();
}
componentData.Title = (objectCount == 0) ? componentName : componentName + " " + (objectCount + 1).ToString();
componentData.ComponentType = ComponentType.Multimedia;
StreamUpload2010Client streamClient = new StreamUpload2010Client();
FileStream objfilestream = new FileStream(@"[IMAGE_PATH]", FileMode.Open, FileAccess.Read);
string tempLocation = streamClient.UploadBinaryContent("images.jpg", objfilestream);
BinaryContentData binaryContent = new BinaryContentData();
binaryContent.UploadFromFile = tempLocation;
binaryContent.Filename = "[IMAGE_NAME]";
componentData.BinaryContent = binaryContent;
binaryContent.MultimediaType = new LinkToMultimediaTypeData()
{
IdRef = "tcm:0-2-65544"
};
componentData = (ComponentData)tridionGeneration.client.Create(componentData, new ReadOptions());
return componentData;
}
catch (Exception ex)
{
return null;
}
}
这是 Helper 类:
public static class Helper
{
public static void FillSchemaFields(TridionGeneration tridionGeneration, Fields fields)
{
List<XmlData> data = XmlHelper.xmlData;
var ofield = fields.GetEnumerator();
while (ofield.MoveNext())
{
Field f = ofield.Current;
FillFieldValue(tridionGeneration, fields, f, data[0]);
}
}
private static void FillFieldValue(TridionGeneration tridionGeneration, Fields fields, Field f, XmlData data)
{
if (f.Type == typeof(MultimediaLinkFieldDefinitionData))
{
fields[f.Name].Value = tridionGeneration.Settings.DefaultImageUri;
}
else if (f.Type != typeof(EmbeddedSchemaFieldDefinitionData))
{
foreach (XmlData fieldvalue in data.Attributes)
{
if (f.Type == typeof(DateFieldDefinitionData))
{
if (fieldvalue.text.ToLower() == f.Name.ToLower())
{
fields[f.Name].Value = Convert.ToDateTime(fieldvalue.value).ToString("yyyy-MM-ddTHH:mm:ss");
}
else
{
string val = FindSchemaValue(tridionGeneration, fieldvalue.Attributes, f.Name);
if (!string.IsNullOrEmpty(val))
{
fields[f.Name].Value = Convert.ToDateTime(val).ToString("yyyy-MM-ddTHH:mm:ss");
}
}
}
else
{
if (fieldvalue.text.ToLower() == f.Name.ToLower())
{
fields[f.Name].Value = System.Net.WebUtility.HtmlEncode(fieldvalue.value);
}
else
{
string val = FindSchemaValue(tridionGeneration, fieldvalue.Attributes, f.Name);
if (!string.IsNullOrEmpty(val))
{
fields[f.Name].Value = System.Net.WebUtility.HtmlEncode(val);
}
}
}
}
}
else
{
Fields fs = f.GetSubFields();
var ofield = fs.GetEnumerator();
while (ofield.MoveNext())
{
Field ff = ofield.Current;
FillFieldValue(tridionGeneration, fs, ff, data);
}
}
}
private static string FindSchemaValue(TridionGeneration tridionGeneration, List<XmlData> data, string fieldname)
{
foreach (XmlData fieldvalue in data)
{
if (fieldvalue.text.ToLower() == fieldname.ToLower())
{
return fieldvalue.value;
}
else
{
FindSchemaValue(tridionGeneration, fieldvalue.Attributes, fieldname);
}
}
return "";
}
}
和 Fields 类:
public class Fields
{
private ItemFieldDefinitionData[] definitions;
private XmlNamespaceManager namespaceManager;
private XmlElement root; // the root element under which these fields live
// at any point EITHER data OR parent has a value
private SchemaFieldsData data; // the schema fields data as retrieved from the core service
private Fields parent; // the parent fields (so we're an embedded schema), where we can find the data
public Fields(SchemaFieldsData _data, ItemFieldDefinitionData[] _definitions, string _content = null, string _rootElementName = null)
{
data = _data;
definitions = _definitions;
var content = new XmlDocument();
if (!string.IsNullOrEmpty(_content))
{
content.LoadXml(_content);
}
else
{
content.AppendChild(content.CreateElement(string.IsNullOrEmpty(_rootElementName) ? _data.RootElementName : _rootElementName, _data.NamespaceUri));
}
root = content.DocumentElement;
namespaceManager = new XmlNamespaceManager(content.NameTable);
namespaceManager.AddNamespace("custom", _data.NamespaceUri);
}
public Fields(Fields _parent, ItemFieldDefinitionData[] _definitions, XmlElement _root)
{
definitions = _definitions;
parent = _parent;
root = _root;
}
public static Fields ForContentOf(SchemaFieldsData _data)
{
return new Fields(_data, _data.Fields);
}
public static Fields ForContentOf(SchemaFieldsData _data, ComponentData _component)
{
return new Fields(_data, _data.Fields, _component.Content);
}
public static Fields ForMetadataOf(SchemaFieldsData _data, RepositoryLocalObjectData _item)
{
return new Fields(_data, _data.MetadataFields, _item.Metadata, "Metadata");
}
public string NamespaceUri
{
get { return data != null ? data.NamespaceUri : parent.NamespaceUri; }
}
public XmlNamespaceManager NamespaceManager
{
get { return parent != null ? parent.namespaceManager : namespaceManager; }
}
internal IEnumerable<XmlElement> GetFieldElements(ItemFieldDefinitionData definition)
{
return root.SelectNodes("custom:" + definition.Name, NamespaceManager).OfType<XmlElement>();
}
internal XmlElement AddFieldElement(ItemFieldDefinitionData definition)
{
var newElement = root.OwnerDocument.CreateElement(definition.Name, NamespaceUri);
XmlNodeList nodes = root.SelectNodes("custom:" + definition.Name, NamespaceManager);
XmlElement referenceElement = null;
if (nodes.Count > 0)
{
referenceElement = (XmlElement)nodes[nodes.Count - 1];
}
else
{
// this is the first value for this field, find its position in the XML based on the field order in the schema
bool foundUs = false;
for (int i = definitions.Length - 1; i >= 0; i--)
{
if (!foundUs)
{
if (definitions[i].Name == definition.Name)
{
foundUs = true;
}
}
else
{
var values = GetFieldElements(definitions[i]);
if (values.Count() > 0)
{
referenceElement = values.Last();
break; // from for loop
}
}
} // for every definition in reverse order
} // no existing values found
root.InsertAfter(newElement, referenceElement); // if referenceElement is null, will insert as first child
return newElement;
}
public IEnumerator<Field> GetEnumerator()
{
return (IEnumerator<Field>)new FieldEnumerator(this, definitions);
}
public Field this[string _name]
{
get
{
var definition = definitions.First<ItemFieldDefinitionData>(ifdd => ifdd.Name == _name);
if (definition == null) throw new ArgumentOutOfRangeException("Unknown field '" + _name + "'");
return new Field(this, definition);
}
}
public override string ToString()
{
return root.OuterXml;
}
}
public class FieldEnumerator : IEnumerator<Field>
{
private Fields fields;
private ItemFieldDefinitionData[] definitions;
// Enumerators are positioned before the first element until the first MoveNext() call
int position = -1;
public FieldEnumerator(Fields _fields, ItemFieldDefinitionData[] _definitions)
{
fields = _fields;
definitions = _definitions;
}
public bool MoveNext()
{
position++;
return (position < definitions.Length);
}
public void Reset()
{
position = -1;
}
object IEnumerator.Current
{
get
{
return Current;
}
}
public Field Current
{
get
{
try
{
return new Field(fields, definitions[position]);
}
catch (IndexOutOfRangeException)
{
throw new InvalidOperationException();
}
}
}
public void Dispose()
{
}
}
public class Field
{
private Fields fields;
private ItemFieldDefinitionData definition;
public Field(Fields _fields, ItemFieldDefinitionData _definition)
{
fields = _fields;
definition = _definition;
}
public string Name
{
get { return definition.Name; }
}
public Type Type
{
get { return definition.GetType(); }
}
public string Value
{
get
{
return Values.Count > 0 ? Values[0] : null;
}
set
{
if (Values.Count == 0) fields.AddFieldElement(definition);
Values[0] = value;
}
}
public ValueCollection Values
{
get
{
return new ValueCollection(fields, definition);
}
}
public void AddValue(string value = null)
{
XmlElement newElement = fields.AddFieldElement(definition);
if (value != null) newElement.InnerText = value;
}
public void RemoveValue(string value)
{
var elements = fields.GetFieldElements(definition);
foreach (var element in elements)
{
if (element.InnerText == value)
{
element.ParentNode.RemoveChild(element);
}
}
}
public void RemoveValue(int i)
{
var elements = fields.GetFieldElements(definition).ToArray();
elements[i].ParentNode.RemoveChild(elements[i]);
}
public IEnumerable<Fields> SubFields
{
get
{
var embeddedFieldDefinition = definition as EmbeddedSchemaFieldDefinitionData;
if (embeddedFieldDefinition != null)
{
var elements = fields.GetFieldElements(definition);
foreach (var element in elements)
{
yield return new Fields(fields, embeddedFieldDefinition.EmbeddedFields, (XmlElement)element);
}
}
}
}
public Fields GetSubFields(int i = 0)
{
var embeddedFieldDefinition = definition as EmbeddedSchemaFieldDefinitionData;
if (embeddedFieldDefinition != null)
{
var elements = fields.GetFieldElements(definition);
if (i == 0 && !elements.Any())
{
// you can always set the first value of any field without calling AddValue, so same applies to embedded fields
AddValue();
elements = fields.GetFieldElements(definition);
}
return new Fields(fields, embeddedFieldDefinition.EmbeddedFields, elements.ToArray()[i]);
}
else
{
throw new InvalidOperationException("You can only GetSubField on an EmbeddedSchemaField");
}
}
// The subfield with the given name of this field
public Field this[string name]
{
get { return GetSubFields()[name]; }
}
// The subfields of the given value of this field
public Fields this[int i]
{
get { return GetSubFields(i); }
}
}
关于tridion - 使用核心服务创建具有元数据字段的多媒体组件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/12190850/