下載官方.NET SDK，編譯之后生成 TopSdk.dll，C#項目中引用這個DLL文件 ，也可以在項目中帶着官方代碼。
一、准備工作：
CorpId：認證的企業都有這個，敏感信息，拒絕泄露
CorpSecret：認證的企業都有這個，敏感信息，拒絕泄露
AgentID：新建的H5應用會給應用憑證 AppKey，AppSecret，AgentID 發送工作通知需要 AgentID，其他兩個不用。
二、查看官方文檔，例子是JAVA。改成.Net 即可。園子有人用asyncsend 接口也能發送成功。我們這里使用官方文檔中的接口。
https://oapi.dingtalk.com/topapi/message/corpconversation/asyncsend_v2
官方JVAV代碼改成.NET沒有碰到問題，直接上代碼吧。
/// <summary>
/// 發送釘釘工作消息
/// </summary>
/// <param name="agentId">應用的憑證號</param>
/// <param name="userID">接收消息的員工號</param>
/// <returns></returns>
public static string SendDingMessage(long agentId,string userID)
{
//string Access_token=獲得token。這里只演示發送消息，默認已經獲得了token
//定義client
IDingTalkClient client = new DefaultDingTalkClient("https://oapi.dingtalk.com/topapi/message/corpconversation/asyncsend_v2");
//定義 request2
OapiMessageCorpconversationAsyncsendV2Request req = new OapiMessageCorpconversationAsyncsendV2Request();
req.SetHttpMethod("POST");//非必須
req.ToAllUser = false;//是否發送給所有人，限額3條
req.AgentId = agentId;//應用的ID
req.UseridList = userID;// 員工UserID;
//要發送的消息
MsgDomain message = AddOaMessage("張三");// new MsgDomain();
//卡片消息 文件消息 圖片消息 鏈接消息 markdown消息 OA消息 文本消息 語音消息
//action_card file image link markdown oa text voice
/*
//Text
TextDomain text = new TextDomain();
text.Content = "123";
obj1.Text = text;
//image
ImageDomain image = new ImageDomain();
image.MediaId = "@123";
obj1.Image = image;
//link
LinkDomain link = new LinkDomain();
link.PicUrl="picUrl";
link.MessageUrl="messageUrl";
link.Text="text";
link.Title="title";
obj1.Link=link;
//file
FileDomain obj5 = new FileDomain();
obj5.MediaId="media_id";
obj1.File=obj5;
//voice
VoiceDomain obj6 = new VoiceDomain();
obj6.Duration="100";
obj6.MediaId="100";
obj1.Voice=obj6;
//Markdown
MarkdownDomain obj14 = new MarkdownDomain();
obj14.Text="text";
obj14.Title="title";
obj1.Markdown=obj14;
*/
/*
//ActionCard
ActionCardDomain actionCard = new ActionCardDomain();
List<BtnJsonListDomain> list17 = new List<BtnJsonListDomain>();
BtnJsonListDomain btnJsonList = new BtnJsonListDomain();
btnJsonList.ActionUrl="action_url";
btnJsonList.Title="title";
list17.Add(btnJsonList);
actionCard.BtnJsonList=list17;
actionCard.BtnOrientation="btn_orientation";
actionCard.SingleUrl="single_url";
actionCard.SingleTitle="single_title";
actionCard.Markdown="markdown";
actionCard.Title="title";
obj1.ActionCard=actionCard;
*/
req.Msg_ = message;
OapiMessageCorpconversationAsyncsendV2Response rsp = client.Execute(req, Access_token);
return rsp.Body;
}
/// <summary>
/// 創建一個OA消息
/// </summary>
/// <param name="UserName">用戶名，非必須</param>
/// <returns></returns>
private static MsgDomain AddOaMessage(string UserName)
{
#region 輔助生成金額隨機數
byte[] buffer = Guid.NewGuid().ToByteArray();
int iSeed = BitConverter.ToInt32(buffer, 0);
Random random = new Random(iSeed);
string money = random.Next(100).ToString();
#endregion
MsgDomain message = new MsgDomain();
//卡片消息 文件消息 圖片消息 鏈接消息 markdown消息 OA消息 文本消息 語音消息
//action_card file image link markdown oa text voice
message.Msgtype = "oa";
OADomain OaMsg = new OADomain();//OA消息
//包括 body head MessageUrl PcMessageUrl
OaMsg.MessageUrl = "http://dingtalk.com";//消息點擊鏈接地址，當發送消息為小程序時支持小程序跳轉鏈接
OaMsg.PcMessageUrl = "http://dingtalk.com";//PC端點擊消息時跳轉到的地址
//消息頭 //*消息頭部內容
HeadDomain head = new HeadDomain();
head.Bgcolor = "FFBBBBBB";
head.Text = "測試001";
//oa 消息頭
OaMsg.Head = head;
//*body 消息體
BodyDomain body = new BodyDomain();
body.Author = "admin";//*發送人
body.FileCount = "3";//文件數量 非必須
body.Image = "@lADOADmaWMzazQKA";//圖片 非必須
body.Content = "釘釘URL";//*內容
body.Title = "測試" + Guid.NewGuid().ToString("N");//*標題
//**金額,一個數字類型
RichDomain rich = new RichDomain();
rich.Unit = "元";
rich.Num = money;
//**Form
List<FormDomain> form = new List<FormDomain>();
FormDomain obj12 = new FormDomain();
obj12.Value = UserName;
obj12.Key = "姓名";
form.Add(obj12);
FormDomain form2 = new FormDomain();
form2.Value = "打牌，游泳";
form2.Key = "愛好";
form.Add(form2);
//body 包括2項
body.Rich = rich;
body.Form = form;
//OA消息 body 消息體
OaMsg.Body = body;
//消息
message.Oa = OaMsg;
return message;
}
private static MsgDomain AddTextMessage(string UserName)
{
#region 輔助生成金額隨機數
byte[] buffer = Guid.NewGuid().ToByteArray();
int iSeed = BitConverter.ToInt32(buffer, 0);
Random random = new Random(iSeed);
string money = random.Next(100).ToString();
#endregion
MsgDomain message = new MsgDomain();
//卡片消息 文件消息 圖片消息 鏈接消息 markdown消息 OA消息 文本消息 語音消息
//action_card file image link markdown oa text voice
message.Msgtype = "text";
//Text
TextDomain text = new TextDomain();
text.Content = UserName + "123" + money;
message.Text = text;
return message;
}
推送消息效果。
SDK：
https://ding-doc.dingtalk.com/doc#/faquestions/vzbp02
官方文檔：
https://ding-doc.dingtalk.com/document#/org-dev-guide/send-work-notifications
消息類型：
https://ding-doc.dingtalk.com/document#/org-dev-guide/message-types-and-data-format#topic-2618201
參考：
https://www.cnblogs.com/seaquakear/p/11444901.html