findcontrol

问题 I have to find a Control in an aspx page bound to a master page. The master page contains: <asp:ContentPlaceHolder ID="MainContent" runat="server"/> The content page contains: <asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" Runat="Server"> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" Runat="Server"> </asp:Content> I added a Table with ID formtable as a child of Content2 . I tried to use the following code to access the Table , but the code returns

问题 Existed MyControl1.Controls.OfType<RadioButton>() searches only thru initial collection and do not enters to children. Is it possible to find all child controls of specific type using Enumerable.OfType<T>() or LINQ without writing own recursive method? Like this. 回答1: I use an extension method to flatten control hierarchy and then apply filters, so that's using own recursive method. The method looks like this public static IEnumerable<Control> FlattenChildren(this Control control) { var

问题 This question already has answers here : Better way to find control in ASP.NET (8 answers) Closed last year . I\'m sorry, but I can\'t understand why this doesn\'t work. After compile, I receive a \"Null reference exception\". Please help. public partial class labs_test : System.Web.UI.Page { protected void Button1_Click(object sender, EventArgs e) { if (TextBox1.Text != \"\") { Label Label1 = (Label)Master.FindControl(\"Label1\"); Label1.Text = \"<b>The text you entered was: \" + TextBox1

问题 I was wondering how one would find the controls in the HeaderTemplate or FooterTemplate of an Asp.Net Repeater control. I can access them on the ItemDataBound event, but I was wondering how to get them after (for example to retrieve a value of an input in the header/footer). Note: I posted this question here after finding the answer just so that I remember it (and maybe other people might find this useful). 回答1: As noted in the comments, this only works AFTER you've DataBound your repeater.

问题 Hi i have few a single textbox within the the datatemplate for itemscontrol. When i bind the itemcontrols to a observable collection i get two text boxes. But i need to do some manipulations based on each of the text boxes for which i want to find each textbox seperatly using some id. Can anybody help on how to find a control witin the itemscontrol in WPF. 回答1: Using the ItemContainerGenerator you can obtain the generated container for an item and traverse the visual tree downwards to find

问题 How does FindControl method works if I need to find any Control which is inside GridView Template , more specifically ItemTemplate ? I have a hyperlink but it is not able to find the same. Question updated with code GridView Code is below: <asp:GridView ID=\"grvYourOpportunities\" runat=\"server\" AllowPaging=\"True\" AutoGenerateColumns=\"False\" DataKeyNames=\"ID#,B,H\" PageSize=\"20\" CellPadding=\"4\" ForeColor=\"#333333\" GridLines=\"Both\" OnRowDataBound=\"grvYourOpt_RowDataBound\">

问题 I have a complex asp.net form,having even 50 to 60 fields in one form like there is Multiview , inside MultiView I have a GridView , and inside GridView I have several CheckBoxes . Currently I am using chaining of the FindControl() method and retrieving the child ID. Now, my question is that is there any other way/solution to find the nested control in ASP.NET. 回答1: If you're looking for a specific type of control you could use a recursive loop like this one - http://weblogs.asp.net/eporter