我们从SOAP移植我们的.NET代码拉力赛到REST .NET API的过程。 到目前为止好，在REST API似乎是更快，更容易使用，因为没有WSDL每次工作产品的自定义字段中的拉力赛工作区更改打破。
我有一个麻烦的事情，虽然我们试图复制到上传附件的能力。 我们一直遵循一个非常类似的操作程序，在此公告中列出的一个：
拉力SOAP API -如何添加附件的层次需求
从而使图像读入System.Drawing.Image对象。 我们使用ImageToByteArray功能将图像转换，然后被分配到AttachmentContent，这是第一次创建一个字节数组。
然后，附件被创建和有线长达两个AttachmentContent和HierarchicalRequirement。
所有创建活动的工作的伟大。 内容对象被创建的罚款。 那么所谓的“Image.png”新的附件被创建并链接到故事。 但是，当我从拉力下载最终的附件，Image.png具有零个字节！ 我曾与不同的图像，JPEG的，巴新等，都具有相同的结果尝试这样做。
展示我们处理的代码的摘录包含下面。 有没有办法，我失去了一些东西明显？ 提前致谢。
// .... Read content into a System.Drawing.Image called imageObject ....
// Convert Image to byte array
byte[] imageBytes = ImageToByteArray(imageObject, System.Drawing.Imaging.ImageFormat.Png);
var imageLength = imageBytes.Length;
// AttachmentContent
DynamicJsonObject attachmentContent = new DynamicJsonObject();
attachmentContent["Content"] = imageBytes ;
CreateResult cr = restApi.Create("AttachmentContent", myAttachmentContent);
String contentRef = cr.Reference;
Console.WriteLine("Created: " + contentRef);
// Set up attachment
DynamicJsonObject newAttachment = new DynamicJsonObject();
newAttachment["Artifact"] = story;
newAttachment["Content"] = attachmentContent;
newAttachment["Name"] = "Image.png";
newAttachment["ContentType"] = "image/png";
newAttachment["Size"] = imageLength;
newAttachment["User"] = user;
// Create the attachment in Rally
cr = restApi.Create("Attachment", newAttachment);
String attachRef = cr.Reference;
Console.WriteLine("Created: " + attachRef);
}
public static byte[] ImageToByteArray(Image image, System.Drawing.Imaging.ImageFormat format)
{
using (MemoryStream ms = new MemoryStream())
{
image.Save(ms, format);
// Convert Image to byte[]
byte[] imageBytes = ms.ToArray();
return imageBytes;
}
}
这个问题也让我困惑了一会儿 - 终于整理出来大约一个星期前。
两种意见：
- 虽然拉力赛的SOAP API将序列化的字节数组到幕后Base64编码字符串，REST没有做到这一步你并期待一个Base64格式的字符串作为AttachmentContent对象的内容属性进行传递。
- 在您的例子所示System.Drawing.Image.Length不会提供拉力赛是WSAPI期待的正确长度。 你需要通过Base64编码格式的字符串的长度被转换回常规字符串之后。 这也是一样的字节数组的长度。
我包括一个代码示例来说明：
// System Libraries
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing.Imaging;
using System.Drawing;
using System.IO;
using System.Web;
// Rally REST API Libraries
using Rally.RestApi;
using Rally.RestApi.Response;
namespace RestExample_CreateAttachment
{
class Program
{
static void Main(string[] args)
{
// Set user parameters
String userName = "user@company.com";
String userPassword = "password";
// Set Rally parameters
String rallyURL = "https://rally1.rallydev.com";
String rallyWSAPIVersion = "1.36";
//Initialize the REST API
RallyRestApi restApi;
restApi = new RallyRestApi(userName,
userPassword,
rallyURL,
rallyWSAPIVersion);
// Create Request for User
Request userRequest = new Request("user");
userRequest.Fetch = new List<string>()
{
"UserName",
"Subscription",
"DisplayName",
};
// Add a Query to the Request
userRequest.Query = new Query("UserName",Query.Operator.Equals,userName);
// Query Rally
QueryResult queryUserResults = restApi.Query(userRequest);
// Grab resulting User object and Ref
DynamicJsonObject myUser = new DynamicJsonObject();
myUser = queryUserResults.Results.First();
String myUserRef = myUser["_ref"];
//Set our Workspace and Project scopings
String workspaceRef = "/workspace/12345678910";
String projectRef = "/project/12345678911";
bool projectScopingUp = false;
bool projectScopingDown = true;
// Find User Story that we want to add attachment to
// Tee up Story Request
Request storyRequest = new Request("hierarchicalrequirement");
storyRequest.Workspace = workspaceRef;
storyRequest.Project = projectRef;
storyRequest.ProjectScopeDown = projectScopingDown;
storyRequest.ProjectScopeUp = projectScopingUp;
// Fields to Fetch
storyRequest.Fetch = new List<string>()
{
"Name",
"FormattedID"
};
// Add a query
storyRequest.Query = new Query("FormattedID", Query.Operator.Equals, "US43");
// Query Rally for the Story
QueryResult queryResult = restApi.Query(storyRequest);
// Pull reference off of Story fetch
var storyObject = queryResult.Results.First();
String storyReference = storyObject["_ref"];
// Read In Image Content
String imageFilePath = "C:\\Users\\username\\";
String imageFileName = "image1.png";
String fullImageFile = imageFilePath + imageFileName;
Image myImage = Image.FromFile(fullImageFile);
// Get length from Image.Length attribute - don't use this in REST though
// REST expects the length of the image in number of bytes as converted to a byte array
var imageFileLength = new FileInfo(fullImageFile).Length;
Console.WriteLine("Image File Length from System.Drawing.Image: " + imageFileLength);
// Convert Image to Base64 format
string imageBase64String = ImageToBase64(myImage, System.Drawing.Imaging.ImageFormat.Png);
// Length calculated from Base64String converted back
var imageNumberBytes = Convert.FromBase64String(imageBase64String).Length;
// This differs from just the Length of the Base 64 String!
Console.WriteLine("Image File Length from Convert.FromBase64String: " + imageNumberBytes);
// DynamicJSONObject for AttachmentContent
DynamicJsonObject myAttachmentContent = new DynamicJsonObject();
myAttachmentContent["Content"] = imageBase64String;
try
{
CreateResult myAttachmentContentCreateResult = restApi.Create("AttachmentContent", myAttachmentContent);
String myAttachmentContentRef = myAttachmentContentCreateResult.Reference;
Console.WriteLine("Created: " + myAttachmentContentRef);
// DynamicJSONObject for Attachment Container
DynamicJsonObject myAttachment = new DynamicJsonObject();
myAttachment["Artifact"] = storyReference;
myAttachment["Content"] = myAttachmentContentRef;
myAttachment["Name"] = "AttachmentFromREST.png";
myAttachment["Description"] = "Attachment Desc";
myAttachment["ContentType"] = "image/png";
myAttachment["Size"] = imageNumberBytes;
myAttachment["User"] = myUserRef;
CreateResult myAttachmentCreateResult = restApi.Create("Attachment", myAttachment);
List<string> createErrors = myAttachmentContentCreateResult.Errors;
for (int i = 0; i < createErrors.Count; i++)
{
Console.WriteLine(createErrors[i]);
}
String myAttachmentRef = myAttachmentCreateResult.Reference;
Console.WriteLine("Created: " + myAttachmentRef);
}
catch (Exception e)
{
Console.WriteLine("Unhandled exception occurred: " + e.StackTrace);
Console.WriteLine(e.Message);
}
}
// Converts image to Base 64 Encoded string
public static string ImageToBase64(Image image, System.Drawing.Imaging.ImageFormat format)
{
using (MemoryStream ms = new MemoryStream())
{
image.Save(ms, format);
// Convert Image to byte[]
byte[] imageBytes = ms.ToArray();
// Convert byte[] to Base64 String
string base64String = Convert.ToBase64String(imageBytes);
return base64String;
}
}
}
}
