Asp.net 查找不到动态创建的控件之解决办法【整理】

方法一：

要想动态添加的控件能"保持",简单的做法就是在page_init里加载,而不是page_load

C# code

protected override void OnInit(EventArgs e)

    {

        try 

        {

            //在这里加载控件

            base.OnInit(e);

        }

        catch (Exception MyEx)

        {    

            MyHelper.ShowExceptionMeessage(MyEx);

        }

        finally

        {

        }

    }

方法二：

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                LoadTextBox();
            }
        }
        
        protected override void LoadViewState(object savedState)
        {
            base.LoadViewState(savedState);
        
            if (IsDynamicLoadControl)
            {
                LoadTextBox();
            }
        }
        private void LoadTextBox()
             {
                 for (int i = 0; i < 10; i++)
            {
                 TextBox input = new TextBox();
                 input.ID = "input" + i.ToString();
                 this.form1.Controls.Add(input);
            }
            IsDynamicLoadControl = true;
        }
        public bool IsDynamicLoadControl
        {
            get
            {
                object dynamic = ViewState["IsDynamicLoadControl"];
                return dynamic == null ? false : true;
            }
            set
            {
                ViewState["IsDynamicLoadControl"] = value;
            }
        }

TextBox tb = this.FindControl("input0") as TextBox;

ClientScript.RegisterStartupScript( this.GetType(), "", string.Format("<script>alert('{0}')</script>",tb.Text));

最后可以进行测试一下：