本文整理汇总了C#中BlogMLBlog.FirstOrDefault方法的典型用法代码示例。如果您正苦于以下问题：C# BlogMLBlog.FirstOrDefault方法的具体用法？C# BlogMLBlog.FirstOrDefault怎么用？C# BlogMLBlog.FirstOrDefault使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类BlogMLBlog的用法示例。
在下文中一共展示了BlogMLBlog.FirstOrDefault方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: ImportCategories
//.........这里部分代码省略.........
refrencedCategoriesIds.Add(newCategoryId);
}
}
}
Guid testParseGuid;
var oldIdsCategories = newIdsForCategories.Keys.Where(t => Guid.TryParse(t, out testParseGuid)).Select(t => new Guid(t)).ToList();
var existingCategoriesIdsFuture = repository.AsQueryable<Category>().Select(t => t.Id).Where(t => oldIdsCategories.Contains(t)).ToFuture();
var availableFor = repository.AsQueryable<CategorizableItem>().ToFuture().ToList();
var existingCategoriesIds = existingCategoriesIdsFuture.ToList();
// creates categories trees
foreach (var categoryTree in categories.Where(c => string.IsNullOrEmpty(c.ParentRef)))
{
var newTree = new CategoryTree
{
Title = categoryTree.Title,
CreatedOn = categoryTree.DateCreated,
ModifiedOn = categoryTree.DateModified,
Id = new Guid(categoryTree.ID)
};
newTree.AvailableFor = new List<CategoryTreeCategorizableItem>();
foreach (var categorizableItem in availableFor)
{
newTree.AvailableFor.Add(new CategoryTreeCategorizableItem { CategorizableItem = categorizableItem, CategoryTree = newTree });
}
newCategoriesTreeList.Add(newTree);
}
// create categories
foreach (var category in categories.Where(t => !string.IsNullOrEmpty(t.ParentRef)))
{
var categoryParentId = new Guid(category.ParentRef);
var newParentCategoryTree = newCategoriesTreeList.FirstOrDefault(t => t.Id == categoryParentId);
var newCategory = new Category
{
Name = category.Title,
CreatedOn = category.DateCreated,
ModifiedOn = category.DateModified,
Id = new Guid(category.ID),
CategoryTree = newParentCategoryTree
};
newCategoriesList.Add(newCategory);
}
// set references for category, category tree
foreach (var category in newCategoriesList.Where(t => t.CategoryTree == null))
{
category.CategoryTree = newCategoriesList.First(t => t.Id.ToString() == categories.First(c => c.ID == category.Id.ToString()).ParentRef).CategoryTree;
}
foreach (var tree in newCategoriesTreeList)
{
tree.Categories = newCategoriesList.Where(t => t.CategoryTree != null && t.CategoryTree.Id == tree.Id).ToList();
}
foreach (var child in newCategoriesList)
{
var parentId = new Guid(categories.First(t => t.ID == child.Id.ToString()).ParentRef);
var parentCategory = newCategoriesList.FirstOrDefault(t => t.Id == parentId);
if (parentCategory != null)
{
child.ParentCategory = parentCategory;
parentCategory.ChildCategories = parentCategory.ChildCategories ?? new List<Category>();
parentCategory.ChildCategories.Add(child);
}
}