Create Dataset

{"name": "dataset_name", 
    "defaultMode" : "PushStreaming",
    "tables":   
    [{"name": "", "columns":   
        [{ "name": "column_name1", "dataType": "data_type"},  
         { "name": "column_name2", "dataType": "data_type"},  
         { ... }  
        ]  
      }  
    ]
}

    {"name": "dataset_name", 
        "defaultMode": "AzureAS",
        "tables": [],
        "datasources":
        [{"name":"datasource1","connectionstring":"connection string"}]
        }

{"name": "SalesMarketing","tables":   
    [{"name": "Product", "columns":   
        [{ "name": "ProductID", "dataType": "Int64"},  
         { "name": "Name", "dataType": "string"},  
         { "name": "Category", "dataType": "string"},  
         { "name": "IsCompete", "dataType": "bool"},  
         { "name": "ManufacturedOn", "dataType": "DateTime"}  
        ]  
      }  
    ]  
}  

{
   "name":"SalesMarketing",
   "defaultMode":"AsOnPrem",
   "tables": [],
   "datasources":[
      {
         "name":"SalesMarketing",
         "connectionString":"Data Source=asazure://westcentralus.asazure.windows.net/mypowerbi;Initial Catalog=SalesMarketing;Cube=Model"
      }
   ]
}

{
   "name":"SalesMarketing",
   "defaultMode":"AzureAS",
   "tables": [],
   "datasources":[
      {
         "name":"SalesMarketing",
         "connectionString":"Data Source=asazure://westcentralus.asazure.windows.net/mypowerbi;Initial Catalog=SalesMarketing;Cube=Model"
      }
   ]
}

{            
    "@odata.context":"https://api.powerbi.com/v1.0/myorg/$metadata#datasets/$entity",         
    "id":"{dataset_id}",  
    "name":"{name}",  
    "defaultRetentionPolicy":"{None | basicFIFO}"  
}  

{  
    "@odata.context":"https://api.powerbi.com/v1.0/myorg/$metadata#datasets/$entity",  
    "id":"7c0b090e--b51-172874c749e0",  
    "name":"SalesMarketing",  
    "defaultRetentionPolicy":"basicFIFO"  
}  

    using System;  
    using System.Net;  
    using Microsoft.IdentityModel.Clients.ActiveDirectory;  
    using System.IO;  
    using System.Web.Script.Serialization;  

    static string CreateDataset()  
    {  
        //This is sample code to illustrate a Power BI operation.   
        //In a production application, refactor code into specific methods and use appropriate exception handling.  
          
        //The client id that Azure AD creates when you register your client app.  
        //  To learn how to register a client app, see https://msdn.microsoft.com/en-US/library/dn877542(Azure.100).aspx  
        string clientID = "{client id from Azure AD app registration}";  

        //RedirectUri you used when you register your app.  
        //For a client app, a redirect uri gives Azure AD more details on the application that it will authenticate.  
        // You can use this redirect uri for your client app  
        string redirectUri = "https://login.live.com/oauth20_desktop.srf";  

        //Resource Uri for Power BI API  
        string resourceUri = "https://analysis.windows.net/powerbi/api";  

        //OAuth2 authority Uri  
        string authorityUri = "https://login.windows.net/common/oauth2/authorize";  

        string powerBIApiUrl = "https://api.powerbi.com/v1.0/myorg";  

        //Get access token:   
        // To call a Power BI REST operation, create an instance of AuthenticationContext and call AcquireToken  
        // AuthenticationContext is part of the Active Directory Authentication Library NuGet package  
        // To install the Active Directory Authentication Library NuGet package in Visual Studio,   
        //  run "Install-Package Microsoft.IdentityModel.Clients.ActiveDirectory" from the nuget Package Manager Console.  
          
        // AcquireToken will acquire an Azure access token  
        // Call AcquireToken to get an Azure token from Azure Active Directory token issuance endpoint  
        AuthenticationContext authContext = new AuthenticationContext(authorityUri);  
        string token = authContext.AcquireToken(resourceUri, clientID, new Uri(redirectUri)).AccessToken;  

        //POST web request to create a dataset.  
        //To create a Dataset in a group, use the Groups uri: https://api.powerbi.com/v1.0/myorg/groups/{group_id}/datasets  
        HttpWebRequest request = System.Net.WebRequest.Create(string.Format("{0}/datasets", powerBIApiUrl)) as System.Net.HttpWebRequest;  
        request.KeepAlive = true;  
        request.Method = "POST";  
        request.ContentLength = 0;  
        request.ContentType = "application/json";  
        request.Headers.Add("Authorization", String.Format("Bearer {0}", token));  

        //Create dataset JSON for POST request  
        string json = "{"name": "SalesMarketing", "tables": " +  
            "[{"name": "Product", "columns": " +  
            "[{ "name": "ProductID", "dataType": "Int64"}, " +  
            "{ "name": "Name", "dataType": "string"}, " +  
            "{ "name": "Category", "dataType": "string"}," +  
            "{ "name": "IsCompete", "dataType": "bool"}," +  
            "{ "name": "ManufacturedOn", "dataType": "DateTime"}" +  
            "]}]}";  

        //POST web request  
        byte[] byteArray = System.Text.Encoding.UTF8.GetBytes(json);  
        request.ContentLength = byteArray.Length;  

        //Write JSON byte[] into a Stream  
        using (Stream writer = request.GetRequestStream())  
        {  
            writer.Write(byteArray, 0, byteArray.Length);  

            var response = (HttpWebResponse)request.GetResponse();  

            return response.StatusCode.ToString();  
        }  
    }