c# 委托

最新推荐文章于 2024-12-22 09:55:34 发布

转载最新推荐文章于 2024-12-22 09:55:34 发布 · 47 阅读

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原文链接：http://www.cnblogs.com/woshare/p/4304963.html

在EXtgrid类中

public delegate bool DeleteEvent(string selStr);

public DeleteEvent OnDeleteEvent{get;set;}

protected void btnDelete_Click(object sender, EventArgs e) { DoDelete(); }

public void DoDelete() {

string sel = GetRowsSelected();

if (sel == "")

{ Alert.Show("请选择一条数据！");

return; }

if (OnDeleteEvent != null)//委托给使用者实现

{

try

{

if (OnDeleteEvent(sel))

{ Alert.Show("删除成功！"); BindGrid(); }

else

{ Alert.Show("删除失败！"); } }

catch

{ Alert.Show("删除失败！数据存在引用关系，请查找"); } } }

在继承Extgrid类的页面中，实现委托删除操作

private bool deleteRecord(string recordID)
  {
     int flag = 0;
   try
   {
    string wherecondition="";
    wherecondition=" where SEQ in("+recordID+")";
                t_access = new B_CardAccess(this.connStr);
                flag=t_access.ExecuteDelRecord(wherecondition);
    this.Log("删除");

   }
   catch
   {

   }
   if (flag > 0)
            {
                return true;
            }
            else
            {
                return false;
            }
  }