Power BI API Integration with C#

send2prasan

I see you're getting the dataset from a group, so when set the connection string, use SetAllDatasetConnectionsInGroup instead.

Also, to get more specific information, please add a try..catch block to capture the response details message.

try
                {
                    //client.Datasets.PostRowsInGroup(groupId, "dcb49dcc-7392-4277-9258-ec26bd842b42", "RealTimeData", dataObj);

                    ConnectionDetails cn = new ConnectionDetails();
                    cn.ConnectionString = "data source=Computer1\\SQLEXPRESS;initial catalog=Db_Tent1;persist security info=True;User Id=Username;Password=Password;encrypt=True;trustservercertificate=False";
                    //var datsetList = client.Datasets.GetDatasources(GroupId);
                    var datasets = client.Datasets.GetDatasetsInGroup(groupId);
                    var dashboards1 = client.Datasets.SetAllDatasetConnectionsInGroup(groupId,datasets.Value[0].Id, cn);


                }
                catch (HttpOperationException ex)
               { 
                    //Bad Request
                    var content = ex.Response.Content;
                    Console.WriteLine(content); 
                }