我已经添加了一个短代码到LightSwitch应用程序的服务器端,用于将图像保存到Azure Blob上以添加和更新相关数据条目。
namespace LightSwitchApplication
{
public partial class ApplicationDataService
{
string storageAccount = [aZURE_STORAGE_NAME_HERE]
string containerName = [CONTAINTER_NAME_HERE]
string policyName = [POLICY_NAME_HERE]
string policySig = [OBTAINED_POLICY_SIG_HERE]
partial void SaveChanges_Executing()
{
if (this.DataWorkspace.ApplicationData.Details.HasChanges)
{
EntityChangeSet changeSet = this.DataWorkspace.ApplicationData.Details.GetChanges();
foreach (IEntityObject entity in changeSet.ModifiedEntities)
{
string type = entity.GetType().Name;
// ...
// My type of LightSwitch entities are for example "Places"
UploadFileToBlob((Place)entity, containerName, policyName, policySig);
}
}
}
private void UploadFileToBlob(Place p, String container, String policyName, String policySig)
{
string signature = "?sr=c&si=" + policyName + "&sig=" + policySig;
string file = p.Id + ".png";
WebResponse resp = UploadFile(storageAccount, container, file, signature, p.Photo);
}
static WebResponse UploadFile(string storageAccount, string container, string filename, string signature, byte[] data)
{
try
{
var req = (HttpWebRequest)WebRequest.Create(string.Format("http://{0}.blob.core.windows.net/{1}/{2}{3}", storageAccount, container, filename, signature));
req.Method = "PUT";
req.ContentType = "image/png";
req.ContentLength = data.Length;
req.Date = DateTime.UtcNow;
//req.Headers.Add("x-ms-date", DateTime.UtcNow.ToString());
req.Headers.Add("x-ms-version", "2012-02-12");
req.Headers.Add("x-ms-blob-type", "BlockBlob");
using (Stream stream = req.GetRequestStream())
{
stream.Write(data, 0, data.Length);
}
var a = req.Headers.ToString();
return req.GetResponse();
}
catch (Exception e)
{
// ...
}
}
}
}
它做什么它随时发送文件到blob任何时候相应的实体改变。方括号中的值需要根据您的Azure帐户进行更改。
获得政策签名的方法是在官方文档中详细描述的共享访问签名:Part 1 & Part 2。
您是否找到解决方案?寻找同样的事情。 – 2014-02-24 09:40:54
@NielsBosma看到我的答案在下面,希望有所帮助。 – krzysztofkarolczak 2014-03-05 20:31:18