C#BindingSource的DataSource的注意點

主要講bindingSource1.DataSource進行綁定List數據時，如何新增刷新數據

在Form_Load中先綁定數據源

dgPipei.DataSource = bindingSource1;

寫法1，可以正常新增，數據以listpipei這個數組爲準

pipei pi = new pipei();
pi.xuhao = 1;
pi.xiaoma = "001";
pi.date = DateTime.Now;
listpipei.Add(pi);
bindingSource1.DataSource =new List<pipei>(listpipei);

寫法2，第一條能新增，之後不能新增

pipei pi = new pipei();
pi.xuhao = 1;
pi.xiaoma = "001";
pi.date = DateTime.Now;
listpipei.Add(pi);
//bindingSource1.DataSource = new List<pipei>(listpipei);
bindingSource1.DataSource = listpipei;

寫法3，可以正常新增，新增後listpipei的數量也會+1

pipei pi = new pipei();
pi.xuhao = 1;
pi.xiaoma = "001";
pi.date = DateTime.Now;
//listpipei.Add(pi);
//bindingSource1.DataSource = new List<pipei>(listpipei);
bindingSource1.DataSource = listpipei;
bindingSource1.Add(pi);