Firstly I thought that I have a problem with RadTabStrip (this question) but after simplifying the question I found out that the problem is arising from RadGrid so here is the code to reproduce the problem :
Here is the web form code :
And here is the code behind :
When I sort the only column of the grid column it causes the grid to disappear ! Is there any scientific reason for this disappearing ?
What have I missed in my code ?
Thank you for your consideration.
Here is the web form code :
<body> <form id="form1" runat="server"> <div> <asp:Button runat="server" ID="b1" OnClick="b1_OnClick" Text="Create Grid" /> <asp:ScriptManager runat="server"> </asp:ScriptManager> <asp:PlaceHolder runat="server" ID="ph1"></asp:PlaceHolder> </div> </form></body>And here is the code behind :
protected void b1_OnClick(object sender, EventArgs e){ var grid = new RadGrid { AllowSorting = true, DataSource = new List<string> { "abc", "def", "ghi", "klm" } }; ph1.Controls.Add(grid);}When I sort the only column of the grid column it causes the grid to disappear ! Is there any scientific reason for this disappearing ?
What have I missed in my code ?
Thank you for your consideration.
2 Answers, 1 is accepted
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Jayesh Goyani
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answered on 09 Jul 2012, 05:44 AM
Hello,
Please check below code snippet.
Thanks,
Jayesh Goyani
Please check below code snippet.
<asp:Button runat="server" ID="b1" OnClick="b1_OnClick" Text="Create Grid" UseSubmitBehavior="false" /> <asp:PlaceHolder runat="server" ID="ph1"></asp:PlaceHolder>protected bool IsGridShow { get { if (ViewState["IsGridShow"] != null) return Convert.ToBoolean(ViewState["IsGridShow"]); else return false; } set { ViewState["IsGridShow"] = value; } } protected void grid_NeedDataSource(object sender, GridNeedDataSourceEventArgs e) { (sender as RadGrid).DataSource = new List<string> { "abc", "def", "ghi", "klm" }; } protected void Page_Load(object sender, EventArgs e) { if ((Request.Params["__EVENTTARGET"] != null && Request.Params["__EVENTTARGET"] == "b1") || IsGridShow) { var grid = new RadGrid { AllowSorting = true, }; grid.NeedDataSource += new GridNeedDataSourceEventHandler(grid_NeedDataSource); ph1.Controls.Add(grid); IsGridShow = true; }}Thanks,
Jayesh Goyani
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MahMah
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answered on 09 Jul 2012, 05:58 AM
Thanks Jayesh for your quick reply.
It works well.
But can I ask you why we have to add it every time the page loads ? It has some cost for us to implement this schema in large scale projects.
Is there any way to avoid adding it in every page load ? and what happened to the previously created grid ? does that exist in memory but we can not access it ? If its true so we have a memory leakage by using this way.
Thanks for your attention.
It works well.
But can I ask you why we have to add it every time the page loads ? It has some cost for us to implement this schema in large scale projects.
Is there any way to avoid adding it in every page load ? and what happened to the previously created grid ? does that exist in memory but we can not access it ? If its true so we have a memory leakage by using this way.
Thanks for your attention.