Need sample/help for QueueBuildAsync

[MisinformedDNA]

I cannot figure out how to queue a build, specifically a YAML pipeline. I always get the error message:

Could not queue the build because there were validation errors or warnings.

There is no further information.

Here's my code:

string collectionUri = $"https://dev.azure.com/{organization}";
var creds = new VssBasicCredential(string.Empty, pat);
var connection = new VssConnection(new Uri(collectionUri), creds);

var projectClient = connection.GetClient<ProjectHttpClient>();
var project = await projectClient.GetProject(projectName);

var buildClient = await connection.GetClientAsync<BuildHttpClient>();
var definition = await buildClient.GetDefinitionAsync(projectName, 1253);

var build = new Build
{
    Definition = definition,
    Project = project,
};

var response = await buildClient.QueueBuildAsync(build, ignoreWarnings: true);

Setup:

• I have full admin access in the organization
• I created a PAT will full access
• Microsoft.TeamFoundationServer.Client - v16.153.0
• .NET Core 3.1
• In debug, definition and project are what I would expect them to be
• The pipeline is just the starter pipeline, so no variables or parameters are used

What am I doing wrong?

[MisinformedDNA]

Sign... the pipeline was only defined on a specific branch. Once I set the branch name, it worked fine.

However, now I'm stuck at trying to set a variable for the build. How can I do that?

[icnocop]

@MisinformedDNA I found this code snippet https://stackoverflow.com/a/52777688/90287

[MisinformedDNA]

Thanks. This is all I ended up needing:

var json = new JObject(new JProperty("pullRequestId", pullRequestId));
build.Parameters = JsonConvert.SerializeObject(json);