Query issues

To find a specific issue, you can use the NewslettersManager.  The following code finds all issues per campaign with the specified rootCampaign Id through the Native API. Figure 1: GetIssues by rootCampaignId. ```C# using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using Telerik.Sitefinity.Modules.Newsletters; using Telerik.Sitefinity.Newsletters.Model;

namespace Telerik.Sitefinity.Documentation.CodeSnippets.DevGuide.SitefinityEssentials.Modules.EmailCampaigns { public partial class EmailCampaignsSnippets { public static IQueryable GetIssues(Guid rootCampaignId) { NewslettersManager manager = NewslettersManager.GetManager(); var issues = manager.GetIssues(rootCampaignId);

        return issues;
    }
}

}

First, you initialize the **NewslettersManager**. Then, you call **GetIssues** method to retrieve all issues per campaign. You filter the issues based on the *rootCampaign* *Id* property.      
Another way is to use the other overload of the GetIssues method and filter by the instance of the root campaign. See here for [For developers: Query campaigns](slug://for-developers-query-campaigns). The following snippet find all issues per campaign using the campaign instance as a paramer:      *Figure 2: Get issues by rootCampaign instance.*    ```C#
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Telerik.Sitefinity.Modules.Newsletters;
using Telerik.Sitefinity.Newsletters.Model;

namespace Telerik.Sitefinity.Documentation.CodeSnippets.DevGuide.SitefinityEssentials.Modules.EmailCampaigns
{
    public partial class EmailCampaignsSnippets
    {
        public IQueryable<Campaign> GetIssues(Campaign rootCampaign)
        {
            NewslettersManager manager = NewslettersManager.GetManager();
            var issues = manager.GetIssues(rootCampaign);

            return issues;
        }
    }
}

Via NewslettersManager you can also retrieve the latest issue of a campaign. Use the GetLatestIssue as shown in the example below: Figure 3: Get latest issue for campaign. ```C# using System; using Telerik.Sitefinity.Modules.Newsletters; using Telerik.Sitefinity.Newsletters.Model;

namespace Telerik.Sitefinity.Documentation.CodeSnippets.DevGuide.SitefinityEssentials.Modules.EmailCampaigns { public partial class EmailCampaignsSnippets { public Campaign GetLatestIssue(Guid rootCampaignId) { NewslettersManager manager = NewslettersManager.GetManager(); var latestIssue = manager.GetLatestIssue(rootCampaignId);

        return latestIssue;
    }
}

}