[英]How to set a value for a protobuf map<string, string> property in C#
I have the following protoc3 message: 我有以下protoc3消息:
message LocalizedString {
map<string, string> translations = 1
}
When compiled into C#, I get the following autogenerated code: 当编译成C#时,我得到以下自动生成的代码:
using pb = global::Google.Protobuf;
using pbc = global::Google.Protobuf.Collections;
using pbr = global::Google.Protobuf.Reflection;
using scg = global::System.Collections.Generic;
namespace PKIo {
/// <summary>Holder for reflection information generated from io/common/localization.proto</summary>
public static partial class LocalizationReflection {
#region Descriptor
/// <summary>File descriptor for io/common/localization.proto</summary>
public static pbr::FileDescriptor Descriptor {
get { return descriptor; }
}
private static pbr::FileDescriptor descriptor;
static LocalizationReflection() {
byte[] descriptorData = global::System.Convert.FromBase64String(
string.Concat(
"Chxpby9jb21tb24vbG9jYWxpemF0aW9uLnByb3RvEgJpbyKDAQoPTG9jYWxp",
"emVkU3RyaW5nEjsKDHRyYW5zbGF0aW9ucxgBIAMoCzIlLmlvLkxvY2FsaXpl",
"ZFN0cmluZy5UcmFuc2xhdGlvbnNFbnRyeRozChFUcmFuc2xhdGlvbnNFbnRy",
"eRILCgNrZXkYASABKAkSDQoFdmFsdWUYAiABKAk6AjgBQi1aJHN0YXNoLnBh",
"c3NraXQuY29tL2lvL21vZGVsL3Nkay9nby9pb6oCBFBLSW9iBnByb3RvMw=="));
descriptor = pbr::FileDescriptor.FromGeneratedCode(descriptorData,
new pbr::FileDescriptor[] { },
new pbr::GeneratedClrTypeInfo(null, new pbr::GeneratedClrTypeInfo[] {
new pbr::GeneratedClrTypeInfo(typeof(global::PKIo.LocalizedString), global::PKIo.LocalizedString.Parser, new[]{ "Translations" }, null, null, new pbr::GeneratedClrTypeInfo[] { null, })
}));
}
#endregion
}
#region Messages
/// <summary>
/// Localized strings are optionally used to provide translated values for each of supported language.
/// </summary>
public sealed partial class LocalizedString : pb::IMessage<LocalizedString> {
private static readonly pb::MessageParser<LocalizedString> _parser = new pb::MessageParser<LocalizedString>(() => new LocalizedString());
private pb::UnknownFieldSet _unknownFields;
[global::System.Diagnostics.DebuggerNonUserCodeAttribute]
public static pb::MessageParser<LocalizedString> Parser { get { return _parser; } }
[global::System.Diagnostics.DebuggerNonUserCodeAttribute]
public static pbr::MessageDescriptor Descriptor {
get { return global::PKIo.LocalizationReflection.Descriptor.MessageTypes[0]; }
}
[global::System.Diagnostics.DebuggerNonUserCodeAttribute]
pbr::MessageDescriptor pb::IMessage.Descriptor {
get { return Descriptor; }
}
[global::System.Diagnostics.DebuggerNonUserCodeAttribute]
public LocalizedString() {
OnConstruction();
}
partial void OnConstruction();
[global::System.Diagnostics.DebuggerNonUserCodeAttribute]
public LocalizedString(LocalizedString other) : this() {
translations_ = other.translations_.Clone();
_unknownFields = pb::UnknownFieldSet.Clone(other._unknownFields);
}
[global::System.Diagnostics.DebuggerNonUserCodeAttribute]
public LocalizedString Clone() {
return new LocalizedString(this);
}
/// <summary>Field number for the "translations" field.</summary>
public const int TranslationsFieldNumber = 1;
private static readonly pbc::MapField<string, string>.Codec _map_translations_codec
= new pbc::MapField<string, string>.Codec(pb::FieldCodec.ForString(10), pb::FieldCodec.ForString(18), 10);
private readonly pbc::MapField<string, string> translations_ = new pbc::MapField<string, string>();
[global::System.Diagnostics.DebuggerNonUserCodeAttribute]
public pbc::MapField<string, string> Translations {
get { return translations_; }
}
[global::System.Diagnostics.DebuggerNonUserCodeAttribute]
public override bool Equals(object other) {
return Equals(other as LocalizedString);
}
[global::System.Diagnostics.DebuggerNonUserCodeAttribute]
public bool Equals(LocalizedString other) {
if (ReferenceEquals(other, null)) {
return false;
}
if (ReferenceEquals(other, this)) {
return true;
}
if (!Translations.Equals(other.Translations)) return false;
return Equals(_unknownFields, other._unknownFields);
}
[global::System.Diagnostics.DebuggerNonUserCodeAttribute]
public override int GetHashCode() {
int hash = 1;
hash ^= Translations.GetHashCode();
if (_unknownFields != null) {
hash ^= _unknownFields.GetHashCode();
}
return hash;
}
[global::System.Diagnostics.DebuggerNonUserCodeAttribute]
public override string ToString() {
return pb::JsonFormatter.ToDiagnosticString(this);
}
[global::System.Diagnostics.DebuggerNonUserCodeAttribute]
public void WriteTo(pb::CodedOutputStream output) {
translations_.WriteTo(output, _map_translations_codec);
if (_unknownFields != null) {
_unknownFields.WriteTo(output);
}
}
[global::System.Diagnostics.DebuggerNonUserCodeAttribute]
public int CalculateSize() {
int size = 0;
size += translations_.CalculateSize(_map_translations_codec);
if (_unknownFields != null) {
size += _unknownFields.CalculateSize();
}
return size;
}
[global::System.Diagnostics.DebuggerNonUserCodeAttribute]
public void MergeFrom(LocalizedString other) {
if (other == null) {
return;
}
translations_.Add(other.translations_);
_unknownFields = pb::UnknownFieldSet.MergeFrom(_unknownFields, other._unknownFields);
}
[global::System.Diagnostics.DebuggerNonUserCodeAttribute]
public void MergeFrom(pb::CodedInputStream input) {
uint tag;
while ((tag = input.ReadTag()) != 0) {
switch(tag) {
default:
_unknownFields = pb::UnknownFieldSet.MergeFieldFrom(_unknownFields, input);
break;
case 10: {
translations_.AddEntriesFrom(input, _map_translations_codec);
break;
}
}
}
}
}
#endregion
}
I have another message that has a LocalizedString property that I am using for as an input to an rpc function, but I cannot figure out how to set the properties for Translations
. 我有另一条消息,它有一个LocalizedString属性,我用它作为rpc函数的输入,但我无法弄清楚如何设置
Translations
的属性。 In the generated code, Translations
is marked as read only. 在生成的代码中,
Translations
被标记为只读。
How does one construct a protobuf message object that contains a map like this in C#? 如何在C#中构建包含这样的映射的protobuf消息对象?
So after digging through the documentation , I found that Google.Protobuf.Collections.MapField< TKey, TValue >
has getters and setters. 因此,在深入了解文档之后 ,我发现
Google.Protobuf.Collections.MapField< TKey, TValue >
有getter和setter。
The values can by either passing a key, value pair or a dictionary to the Add method of the map. 这些值可以通过将键,值对或字典传递给地图的Add方法。
var localizedName = new LocalizedString();
localizedName.Translations.Add(new Dictionary<string, string>(){
{"ES","Hola"},
{"FR","Bonjour"},
{"JA","こんにちは"},
{"TH","สวัสดี"},
});
localizedName.Translations.Add("ZH_HANS", "你好");
To retrive a value there is a TryGetValue
method: 要检索值,可以使用
TryGetValue
方法:
var translation = "";
localizedName.Translations.TryGetValue("TH", out translation);
// translation == "สวัสดี"
In the method MergeFrom
, it is giving option to add values in translations
in line translations_.Add(other.translations_);
在方法
MergeFrom
,它提供了在行translations_.Add(other.translations_);
添加translations
中的值的选项translations_.Add(other.translations_);
: :
[global::System.Diagnostics.DebuggerNonUserCodeAttribute]
public void MergeFrom(LocalizedString other) {
if (other == null) {
return;
}
translations_.Add(other.translations_);
_unknownFields = pb::UnknownFieldSet.MergeFrom(_unknownFields, other._unknownFields);
}
To answer " How does one construct a protobuf message object that contains a map like this in C# ", Please refer: 要回答“ 如何在C#中构建包含这样的地图的protobuf消息对象 ”,请参阅:
https://developers.google.com/protocol-buffers/docs/reference/csharp-generated https://developers.google.com/protocol-buffers/docs/reference/csharp-generated
https://developers.google.com/protocol-buffers/docs/reference/csharp/class/google/protobuf/collections/map-field-t-key-t-value- https://developers.google.com/protocol-buffers/docs/reference/csharp/class/google/protobuf/collections/map-field-t-key-t-value-
Also there is pull request in github that provides " Proto3 map support for C# " to get the idea how it is implemented: 另外在github中有pull请求,它提供了“ C#的Proto3 map支持 ”,以了解它是如何实现的:
https://github.com/protocolbuffers/protobuf/pull/543 https://github.com/protocolbuffers/protobuf/pull/543
Also refer these to check if it helps: 还请参考这些以检查它是否有帮助:
Dictionary in protocol buffers 协议缓冲区中的字典
How does Protobuf-net support for Dictionary/KeyValuePair works? Protobuf-net对Dictionary / KeyValuePair的支持如何工作?
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