DataList分页
数据库操作用的是LINQ,想用DataList进行分页,不知道该怎么写,还有,顺带问一下,泛型IList<>能直接用(DataTable)强制转换的嘛?求教
[解决办法]
linq分页本来就很简单啊 里面有个wake和skip的方法可以解决你分页的问题
还有想用datatable来转换其实是可以了,要你相应的数据库的实体类
,具体转换可以看
- C# code
#region DataTable To List/Model /// <summary> /// DataTable To List /// </summary> /// <typeparam name="TType">object type</typeparam> /// <param name="dt">DataTable</param> /// <returns>return a List Model type</returns> public static List<T> DataTableToObjectList<T>(DataTable dt) where T : new() { DataRowCollection drc = dt.Rows; int columncount = drc.Count; List<T> result = new List<T>(); //declare the generic type of return Type type = typeof(T); PropertyInfo[] propertys = type.GetProperties(BindingFlags.IgnoreCase|BindingFlags.Instance|BindingFlags.Public|BindingFlags.SetProperty); //get the collections of the model foreach (DataRow r in drc) { result.Add(DataRowToObjectModel<T>(r, propertys)); } return result; } /// <summary> /// DataRow To a Model /// </summary> /// <typeparam name="T">the type of Model</typeparam> /// <param name="r">DataRow</param> /// <param name="propertys">the object to Model</param> /// <returns>return a Model Type</returns> private static T DataRowToObjectModel<T>(DataRow r, PropertyInfo[] propertys) where T : new() { T t = new T(); for (int i = 0; i < propertys.Length; i++) { object obj = r[propertys[i].Name]; if (obj != null) { if (propertys[i].PropertyType == typeof(int)) propertys[i].SetValue(t, PublicMethod.GetInt(obj), null); if (propertys[i].PropertyType == typeof(string)) propertys[i].SetValue(t, obj.ToString(), null); if (propertys[i].PropertyType == typeof(DateTime)) propertys[i].SetValue(t, PublicMethod.GetDateTime(obj), null); } } return t; } #endregion
[解决办法]
泛型IList<>不能直接用(DataTable)强制转换、IList<>是以键值对的形式存在的。
[解决办法]
int pageCount;
int currentPage = 1;
DataView objView = dt.DefaultView; //表示自定义视图
PagedDataSource pds = new PagedDataSource();//表示实例化 分页
pds.DataSource =objView;
pds.AllowPaging = true;允许分页
pds.PageSize = 4;
pageCount = pds.PageCount;//获取页总数
this.Label4.Text = Convert.ToString(pageCount);
pds.CurrentPageIndex = currentPage - 1;
this.Label2.Text = Convert.ToString(currentPage);
this.DataList1.DataSource = pds;
this.DataList1.DataBind();
[解决办法]
private void bind(int n, int m)//举个例子:用linq读取数据库中第n页的前m条记录
{
if (n < 0 || n > count)
return;
DataClassesDataContext dc = new DataClassesDataContext("server=.; integrated security=true;database=url");
var source = (from temp in dc.Class1
orderby temp.id
select new
{
url = temp.url,
name = temp.name
}
).Skip(n * m).Take(m);
ViewState["pageindex"] = n;
txt_pageindex.Text = (n + 1).ToString();
Repeater1.DataSource = source;
Repeater1.DataBind();
if (n == 0)
{
lb_prev.Enabled = false;
lb_next.Enabled = true;
}
else if (n == count)
{
lb_prev.Enabled = true;
lb_next.Enabled = false;
}
else
{
lb_prev.Enabled = true;
lb_next.Enabled = true;
}
}
[解决办法]
去MSDN查一下这个类PagedDataSource你就懂了。网上代码很多,贴给你也是别人的东西,还不如自己学习