Linq 数据表不包含 AsParallel C# 的定义？

Question

i am getting error "datatable does not contain the definition of AsParallel in my Linq Query. pls tell me how to fix this what i am doing wrong.

var results = from myRow in dtTaskandBugs.AsParallel()
                          select myRow;
            results.ForAll(async r =>
            {
                Task<int> storyProcessing = GetStoryid(r["Id"]);
                Task<int> fidProcessing = Fidname(r["Storyid"]);
                Task<string> featureProcessing = r["FeatureID"].ToString() == "0" ? Task.FromResult("Anonymous") : fname(r["FeatureID"]);
                r["Storyid"] = await storyProcessing;
                r["FeatureID"] = await fidProcessing;
                r["FeatureName"] = await featureProcessing;
            });

Answer 1

From what I can see here it appears AsParallel isn't an extension on the DataTable class. You may want to go through the AsEnumerable method and then parallelize as you need.

var results = from myRow in dt.TaskandBugs.AsEnumerable().AsParallel() select myRow;
results.ForAll(async r => ...

See if that doesn't solve your problem.