DataTable 转 List

时间:2023-03-09 04:24:54
DataTable 转 List<T>

最近在做一个项目,表的数据巨多,而且表的字段一般都在30个以上。公司规定不能用Nhibernate以及ef等ORM框架。

所以查询绑定时的工作量极为痛苦。没有办法,自己写了个DataTableToList方法来简化一下,希望对大家有所帮助。

其实这个方法主要是用泛型方法来实现的,代码如下,仅供参考如有不妥,欢迎拍砖!

 protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack) {
GridView1.DataSource =result();
GridView1.DataBind();
}
}
private List<Student> result() {
DataTable dt = new DataTable();
DataColumn[] cols = new DataColumn[] {
new DataColumn(){ ColumnName="name"},
new DataColumn(){ ColumnName="sex"},
new DataColumn(){ ColumnName="age"}
};
dt.Columns.AddRange(cols);
List<object[]> rows = new List<object[]> {
new object[] { "xiaochun","man",""},
new object[] { "xiaochun1", "man", "" },
new object[] { "xiaochun2", "man", "" }
};
Array.ForEach(rows.ToArray(),row=>dt.Rows.Add(row));
List<Student> stuList = new List<Student>();
stuList = DataTableToList(new Student(),dt);
return stuList;
} private List<T> DataTableToList<T>(T obj,DataTable dt) {
List<T> list = new List<T>();
foreach (DataRow row in dt.Rows) {
Type t=typeof(T);
PropertyInfo[] info = t.GetProperties();
foreach (DataColumn col in dt.Columns) {
info.Where(s => s.Name.ToLower() == col.ColumnName.ToLower())
.Select(s => s).First().SetValue(obj,row[col.ColumnName].ToString(),null); }
list.Add(obj);
}
return list;
}
} public class Student{
public string name{get;set;}
public string sex{get;set;}
public string age{get;set;}
}