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：