如何访问内容页面中母版页的动态加载的服务器控件？

Question

I have created Master page and from content page, loaded some server controls to Master Page.

 Control ctrl = Page.ParseControl(result);
 ContentPlaceHolder cph = (ContentPlaceHolder)this.Page.Master.FindControl("ContentPlaceHolder1");
            cph.Controls.Add(ctrl);

Now I need to access the Controls in Content page. But the id specified is changed after parsed the controls. It looks like below.

 <input type="submit" name="ctl00$ContentPlaceHolder1$reset" value="reset" onclick="javascript:WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions(&quot;ctl00$ContentPlaceHolder1$reset&quot;, &quot;&quot;, true, &quot;&quot;, &quot;&quot;, false, false))" id="ctl00_ContentPlaceHolder1_reset" />

So how can i access these controls in content page?

Answer 1

You must also give id before adding control to the master page in order to find the control later

Control ctrl = Page.ParseControl(result);
ctrl.ID="ContentPlaceHolder1_reset";
ContentPlaceHolder cph = (ContentPlaceHolder)this.Page.Master.FindControl("ContentPlaceHolder1");
cph.Controls.Add(ctrl);

hope this works for you.

Update:

If you are adding a list of TextBox, then you can provide id to TextBox as follows

for (int i = 1; i < 11; i++)
    {
        TextBox t1 = new TextBox();
        t1.ID = "TextBox" + i;
        ContentPlaceHolder cph = (ContentPlaceHolder)this.Page.Master.FindControl("ContentPlaceHolder1");
        cph.Controls.Add(t1);
    }

Here I'm adding 10 TextBox to your master page.