c# 委托

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;

}

}