public static async Task <TextAnalyzeOCRResult> GetAzureTextAnalyzeOCR(byte[] myFileBytes)
{
TextAnalyzeOCRResult resultReturn = new TextAnalyzeOCRResult();
HttpClient client = new HttpClient();
client.DefaultRequestHeaders.Add("Ocp-Apim-Subscription-Key", ConfigurationManager.AppSettings["azVisionApiServiceKey"]);
string requestParameters = "language=unk&detectOrientation=true";
string uri = ConfigurationManager.AppSettings["azVisionApiOcrEndpoint"] + "?" + requestParameters;
string contentString = string.Empty;
HttpResponseMessage response;
using (ByteArrayContent content = new ByteArrayContent(myFileBytes))
{
content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
response = await client.PostAsync(uri, content);
contentString = await response.Content.ReadAsStringAsync();
resultReturn = JsonConvert.DeserializeObject <TextAnalyzeOCRResult>(contentString);
return(resultReturn);
}
}
static void GetChanges(ClientContext SPClientContext, string ListId, ILogger log)
{
Web spWeb = SPClientContext.Web;
List myList = spWeb.Lists.GetByTitle(ConfigurationManager.AppSettings["whListName"]);
SPClientContext.Load(myList);
SPClientContext.ExecuteQuery();
ChangeQuery myChangeQuery = GetChangeQueryNew(ListId);
var allChanges = myList.GetChanges(myChangeQuery);
SPClientContext.Load(allChanges);
SPClientContext.ExecuteQuery();
foreach (Change oneChange in allChanges)
{
if (oneChange is ChangeItem)
{
int myItemId = (oneChange as ChangeItem).ItemId;
log.LogInformation($"---- Changed ItemId : " + myItemId);
ListItem myItem = myList.GetItemById(myItemId);
Microsoft.SharePoint.Client.File myFile = myItem.File;
ClientResult <System.IO.Stream> myFileStream = myFile.OpenBinaryStream();
SPClientContext.Load(myFile);
SPClientContext.ExecuteQuery();
byte[] myFileBytes = ConvertStreamToByteArray(myFileStream);
TextAnalyzeOCRResult myResult = GetAzureTextAnalyzeOCR(myFileBytes).Result;
log.LogInformation($"---- Text Analyze OCR Result : " + JsonConvert.SerializeObject(myResult));
myItem["Language"] = myResult.language;
string myText = string.Empty;
for (int oneLine = 0; oneLine < myResult.regions[0].lines.Count(); oneLine++)
{
for (int oneWord = 0; oneWord < myResult.regions[0].lines[oneLine].words.Count(); oneWord++)
{
myText += myResult.regions[0].lines[oneLine].words[oneWord].text + " ";
}
}
myItem["OCRText"] = myText;
myItem.Update();
SPClientContext.ExecuteQuery();
log.LogInformation($"---- Text Analyze OCR added to SharePoint Item");
}
}
}
