(C# UWP/WinRT) OSS List Bucket Objects (Alibaba Cloud)

See more Alibaba Cloud OSS Examples

Demonstrates how to list the objects in a bucket.

The Chilkat S3 functions in the HTTP class are compatible with Alibaba Cloud's OSS service.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

// This example assumes the Chilkat HTTP API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.Http http = new Chilkat.Http();

// Insert your AccessKey ID here:
http.AwsAccessKey = "access-key";

// Insert your AccessKey Secret here:
http.AwsSecretKey = "secret-key";

// To list objects in a bucket located in a different region, use the endpoint for that region, such as "oss-cn-hangzhou.aliyuncs.com 	"
// See Alibaba Object Storage Service Regions and Endpoints
http.AwsEndpoint = "oss-us-east-1.aliyuncs.com";

string bucketName = "chilkat";

string strXml = await http.S3_ListBucketObjectsAsync(bucketName);
if (http.LastMethodSuccess != true) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

Debug.WriteLine("Response status code = " + Convert.ToString(http.LastStatus));

Chilkat.Xml xml = new Chilkat.Xml();
bool success = xml.LoadXml(strXml);
if (success != true) {
    Debug.WriteLine(xml.LastErrorText);
    return;
}

// If the response status code was not 200, then the XML response is not a 
// listing of objects, but instead contains error information.
if (http.LastStatus != 200) {
    Debug.WriteLine(xml.GetXml());
    Debug.WriteLine("Failed.");
    return;
}

// A sample response is shown below.
Debug.WriteLine(xml.GetXml());
Debug.WriteLine("----");

// Use this online tool to generate parsing code from sample XML: 
// Generate Parsing Code from XML

// <?xml version="1.0" encoding="UTF-8"?>
// <ListBucketResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
//     <Name>chilkat</Name>
//     <Prefix/>
//     <Marker/>
//     <MaxKeys>1000</MaxKeys>
//     <IsTruncated>false</IsTruncated>
//     <Contents>
//         <Key>orchard.json</Key>
//         <LastModified>2021-10-29T16:58:12.000Z</LastModified>
//         <ETag>"303FB46CF341094FEF6274B7789CD6AA"</ETag>
//         <Size>22</Size>
//         <StorageClass>STANDARD</StorageClass>
//         <Owner>
//             <ID>5035535379748121</ID>
//             <DisplayName>5035535379748121</DisplayName>
//         </Owner>
//     </Contents>
//     <Contents>
//         <Key>seahorse.jpg</Key>
//         <LastModified>2021-10-29T16:52:01.000Z</LastModified>
//         <ETag>"A8551F0A5437F43A796FCA7623EE9232"</ETag>
//         <Size>24388</Size>
//         <StorageClass>STANDARD</StorageClass>
//         <Owner>
//             <ID>5035535379748121</ID>
//             <DisplayName>5035535379748121</DisplayName>
//         </Owner>
// 
//     </Contents>
// </ListBucketResult>

string Key;
string LastModified;
string ETag;
int Size;
string StorageClass;
string ID;
string DisplayName;

string ListBucketResult_xmlns = xml.GetAttrValue("xmlns");
string Name = xml.GetChildContent("Name");
int MaxKeys = xml.GetChildIntValue("MaxKeys");
string IsTruncated = xml.GetChildContent("IsTruncated");
int i = 0;
int count_i = xml.NumChildrenHavingTag("Contents");
while (i < count_i) {
    xml.I = i;
    Key = xml.GetChildContent("Contents[i]|Key");
    LastModified = xml.GetChildContent("Contents[i]|LastModified");
    ETag = xml.GetChildContent("Contents[i]|ETag");
    Size = xml.GetChildIntValue("Contents[i]|Size");
    StorageClass = xml.GetChildContent("Contents[i]|StorageClass");
    ID = xml.GetChildContent("Contents[i]|Owner|ID");
    DisplayName = xml.GetChildContent("Contents[i]|Owner|DisplayName");
    i = i + 1;
}