func ViewBlog(ctx *middleware.Context, params martini.Params) {
id := params["id"]
blog := new(model.Blog)
blog.Id = ParseInt(id)
err := blog.GetBlog()
blog.Visit += 1
blog.UpdateVisit()
PanicIf(err)
ctx.Set("Blog", blog)
tags, err := blog.GetAllTags()
PanicIf(err)
ctx.Set("Tags", tags)
ctx.HTML(200, "blog/view", ctx)
}