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using click event of dynamically created button inside dynamically created accordionpane

I have a method that generates accordionpanes and panels and inside each accordionpane I create a button. This methode I use it in the listviewselectedindexchanged method to create the order object and fillup the body panel
protected void PanelCreator(Order order, List<Panel> pnllist)
{
Panel panelHead = new Panel();
panelHead.ID = "pH" + order.product;
panelHead.CssClass = "cpHeader";
//Add Label inside header panel to display text
Label lblHead = new Label();
lblHead.ID = order.product;
lblHead.Text = order.productName + " €" + order.priceValue;
panelHead.Controls.Add(lblHead);
//Create Body Panel
Panel panelBody = new Panel();
panelBody.ID = "pB" + order.product;
panelBody.CssClass = "cpBody";
AccordionPane ap = new AccordionPane();
foreach (Panel p in pnllist)
{
panelBody.Controls.Add(p);
}
Button btn = new Button();
btn.ID = "btn" + order.product;
btn.Text = "Toevoegen";
btn.Click += new EventHandler(btn_Click);
panelHead.Controls.Add(btn);
ap.ID = "ap" + order.product;
ap.HeaderContainer.Controls.Add(panelHead);
ap.ContentContainer.Controls.Add(panelBody);
accMenu.Panes.Add(ap);
}
I am trying to reach each buttons click event but don't know how to do it.
I have this method as for the click event to test a label inside the updatepanel but not working
protected void btn_Click(object sender, EventArgs e)
{
nameLabel.Text = "testinf";
}
this is my aspx page:
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
<asp:Panel ID="Panel1" runat="server"></asp:Panel>
<asp:Label ID="nameLabel" runat="server" Text="aa" />
<div style="overflow-x: auto;">
<asp:ListView ID="ListView1" runat="server" DataKeyNames="main_product_id" DataSourceID="odsMainProduct" OnSelectedIndexChanged="ListView1_SelectedIndexChanged">
<ItemTemplate>
<stackpanel orientation="Horizontal" />
<td>
<asp:LinkButton ID="lnkSelect" runat="server" CommandName="Select" Font-Overline="false" Font-Bold="true" Font-Size="15px" Height="30px" Text='<%# Eval("name") %>' />
<%--<asp:Label ID="nameLabel" runat="server" Text='<%# Eval("name") %>' />--%></td>
</ItemTemplate>
<LayoutTemplate>
<table runat="server">
<tr runat="server">
<td runat="server">
<table id="itemPlaceholderContainer" runat="server" border="0" style="">
<tr runat="server" style="color: white; text-align: left; width: auto">
</tr>
<tr id="itemPlaceholder" runat="server">
</tr>
</table>
</td>
</tr>
<tr runat="server">
<td runat="server" style=""></td>
</tr>
</table>
</LayoutTemplate>
<SelectedItemTemplate>
<td>
<asp:LinkButton ID="lnkSelect0" runat="server" CommandName="Select" Font-Overline="false" Font-Size="20px" ForeColor="red" Height="30px" Text='<%# Eval("name") %>' />
<%--<asp:Label ID="nameLabel" runat="server" Text='<%# Eval("name") %>' />--%></td>
</SelectedItemTemplate>
</asp:ListView>
</div>
<asp:ObjectDataSource ID="odsMainProduct" runat="server" OldValuesParameterFormatString="original_{0}" SelectMethod="GetMainProducts" TypeName="MainProductBLL"></asp:ObjectDataSource>
<asp:Accordion ID="accMenu" runat="server"></asp:Accordion>
</ContentTemplate>
</asp:UpdatePanel>

You need to store your button creation data in ViewState for creating these controls in page-load event, after that button click will be processed correct.
Order class should be marked as Serializable
public Order SelectedOrder
{
get
{
return ViewState["StoredOrder"] == null ? (Order)ViewState["StoredOrder"] : null;
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (SelectedOrder != null)
{
PanelCreator(SelectedOrder);
}
}
protected void listviewselectedindexchanged(object sender, System.EventArgs e)
{
// I am not sure how you got order in this event, you should use your version of code, but idea is the same
ViewState["StoredOrder"] = sender as Order;
PanelCreator(SelectedOrder);
}

How to get item from listview to disable href

How can i get text of each row from Label1?
My .aspx
<asp:ListView ID="lvRestaurant" runat="server" DataSourceID="ldsOrder" DataKeyName="restaurantID">
<LayoutTemplate>
<div>
<asp:PlaceHolder ID="groupPlaceholder" runat="server"></asp:PlaceHolder>
</div>
</LayoutTemplate>
<GroupTemplate>
<div class="restaurant">
<asp:PlaceHolder ID="itemPlaceholder" runat="server"></asp:PlaceHolder>
</div>
</GroupTemplate>
<ItemTemplate>
<div><asp:Label ID="Label1" runat="server" Text='<%# Bind("restaurantID") %>' Visible="false"></asp:Label></div>
<div><asp:Image ID="imgRestaurant" runat="server" ImageUrl='<%# Eval("image", "../resImg/{0}") %>' draggable="false" CssClass="restaurant-img"/></div>
<div class="resName"><b><asp:Label ID="lblName" runat="server" Text='<%# Bind("restaurantName") %>'></asp:Label></b></div>
<div class="deliveryFee"><b>MYR<asp:Label ID="lblDeliveryFee" runat="server" Text='<%# Bind("deliverFee") %>'></asp:Label></b> <span style="color:#C3C3C3;">delivery fee</span></div>
</ItemTemplate>
</asp:ListView>
I try to make if cart exist 1 restaurant product, other restaurant will not be able to click.
My .cs
if(Session["BuyItems"]!=null{
string rID = //get from Label1;
if(rID==Session[existID].ToString()){
orderPage.HreF="#";
}
}

Have a look at foreach, maybe this links can help you.
https://www.codeproject.com/Questions/1029041/How-to-loop-through-a-listbox-items-in-asp-net
How to get all labels and its input elements in javascript
https://www.sitepoint.com/community/t/how-to-get-text-from-a-label-in-a-datalist-itemtemplate/6088/18
Pseudocode
if(Session["BuyItems"]!=null
{
string rID = 5; // for example
foreach (var item in YourListWithRestaurants)
{
if(rID != Session[existID].ToString())
{
// Make the restaurants unable to click
}
}
}

You can do this. Add an OnItemCommand with ListView:
OnItemCommand="ListView_ItemCommand" >
Then you can write an eventhandler:
protected void ListView_ItemCommand(object sender, ListViewCommandEventArgs e)
{
Label label1 = (Label)e.Item.FindControl("Label1");
}

How do i pass a command argument of a button in Data List to another page?

Actually i am trying to redirect command argument of a button present in a data list to another page. I am using Request.QueryString method to access the command argument on another page with the help of command name of the button. Please help me with it...
this is code of button present inside Data List
<asp:Button ID="Button1" runat="server" Text="Read" CommandArgument='<%# Eval("id")%>' OnClick="Button1_Click" CommandName="content"/>
this is code present in DataList Item command function
protected void DataList1_ItemCommand(object source, DataListCommandEventArgs e)
{
Response.Redirect("content.aspx?content=" +e.CommandArgument.ToString());
}
this is the onclick function code
protected void Button1_Click(object sender, EventArgs e)
{
Response.Redirect("content.aspx");
}
this is the code on another page(content.aspx)
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
String id = Request.QueryString["content"];
Label1.Text = id;
}
}
this is entire datalist code
<asp:DataList ID="DataList1" runat="server" DataKeyField="Id" DataSourceID="SqlDataSource1" Height="657px" RepeatColumns="4" RepeatDirection="Horizontal" Width="1248px" OnItemCommand="DataList1_ItemCommand" OnItemDataBound="DataList1_ItemDataBound">
<FooterStyle BackColor="White" ForeColor="#000066" />
<HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
<ItemStyle ForeColor="#000066" />
<ItemTemplate>
<table class="auto-style2">
<tr>
<td style="text-align: center">
<asp:Label ID="Label2" runat="server" Text='<%# Eval("name") %>'></asp:Label>
<asp:Label ID="Label4" runat="server" Text='<%# Eval("Id") %>' Visible="False"></asp:Label>
</td>
</tr>
<tr>
<td style="text-align: center">
<asp:Image ID="Image2" runat="server" Height="250px" ImageUrl='<%# Eval("image") %>' Width="250px" />
</td>
</tr>
<tr>
<td style="text-align: center">
<asp:Label ID="Label3" runat="server" Text="Label"></asp:Label>
<br />
<asp:ImageButton ID="ImageButton1" runat="server" CommandName="addtofav" CommandArgument='<%# Eval("id")%>' Height="30px" Width="20px" />
</td>
</tr>
<tr>
<td style="text-align: center">
<asp:Button ID="Button1" runat="server" Text="Read" CommandArgument='<%# Eval("id")%>' OnClick="Button1_Click" CommandName="content"/>
</td>
</tr>
</table
<br />
<br />
</ItemTemplate>
<SelectedItemStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
it does redirect to another page(content.aspx) but the label does not show the querystring text.

Try updating the DataList1_ItemCommand event to this:
protected void DataList1_ItemCommand(object source, DataListCommandEventArgs e)
{
if (e.CommandName == "content")
{
Response.Redirect("content.aspx?content=" +e.CommandArgument.ToString());
}
}
also make sure you are checking IsPostBack in Page_Load method of this page code behind.

Yes i got the desired output. Actually i was also using another button to redirect to a diiferent page in DataList1_ItemCommand function. So i just needed to seperate the Response.redirects of the 2 buttons by putting them in if loop.
protected void DataList1_ItemCommand(object source, DataListCommandEventArgs e)
{
if (e.CommandName == "content")
{
Response.Redirect("content.aspx?content="+e.CommandArgument.ToString());
}
if (e.CommandName == "addtofav")
{
Response.Redirect("sortbyAZ.aspx?addtofav=" + e.CommandArgument.ToString());
}
}
Thanks You everybody for helping me out with this one

I think you are not casting the Request.QueryString["content"] to string format, try this
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
String id = Request.QueryString["content"];
Label1.Text = id;
}
}

You can find all information you need in this tutorial. from #microsoft msdn
Best of luck
<%# Page Language="C#" AutoEventWireup="True" %>
<%# Import Namespace="System.Data" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>DataList Select Example</title>
<script runat="server">
ICollection CreateDataSource()
{
// Create sample data for the DataList control.
DataTable dt = new DataTable();
DataRow dr;
// Define the columns of the table.
dt.Columns.Add(new DataColumn("Item", typeof(Int32)));
dt.Columns.Add(new DataColumn("Qty", typeof(Int32)));
dt.Columns.Add(new DataColumn("Price", typeof(double)));
// Populate the table with sample values.
for (int i = 0; i < 9; i++)
{
dr = dt.NewRow();
dr[0] = i;
dr[1] = i * 2;
dr[2] = 1.23 * (i + 1);
dt.Rows.Add(dr);
}
DataView dv = new DataView(dt);
return dv;
}
void Page_Load(Object sender, EventArgs e)
{
// Load sample data only once, when the page is first loaded.
if (!IsPostBack)
{
ItemsList.DataSource = CreateDataSource();
ItemsList.DataBind();
}
}
void Item_Command(Object sender, DataListCommandEventArgs e)
{
// Set the SelectedIndex property to select an item in the DataList.
ItemsList.SelectedIndex = e.Item.ItemIndex;
// Rebind the data source to the DataList to refresh the control.
ItemsList.DataSource = CreateDataSource();
ItemsList.DataBind();
}
</script>
</head>
<body>
<form id="form1" runat="server">
<h3>DataList Select Example</h3>
Click <b>Select</b> to select an item.
<br /><br />
<asp:DataList id="ItemsList"
GridLines="Both"
CellPadding="3"
CellSpacing="0"
OnItemCommand="Item_Command"
runat="server">
<HeaderStyle BackColor="#aaaadd">
</HeaderStyle>
<AlternatingItemStyle BackColor="Gainsboro">
</AlternatingItemStyle>
<SelectedItemStyle BackColor="Yellow">
</SelectedItemStyle>
<HeaderTemplate>
Items
</HeaderTemplate>
<ItemTemplate>
<asp:LinkButton id="SelectButton"
Text="Select"
CommandName="Select"
runat="server"/>
Item <%# DataBinder.Eval(Container.DataItem, "Item") %>
</ItemTemplate>
<SelectedItemTemplate>
Item:
<asp:Label id="ItemLabel"
Text='<%# DataBinder.Eval(Container.DataItem, "Item") %>'
runat="server"/>
<br />
Quantity:
<asp:Label id="QtyLabel"
Text='<%# DataBinder.Eval(Container.DataItem, "Qty") %>'
runat="server"/>
<br />
Price:
<asp:Label id="PriceLabel"
Text='<%# DataBinder.Eval(Container.DataItem, "Price", "{0:c}")
%>'
runat="server"/>
</SelectedItemTemplate>
</asp:DataList>
</form>
</body>
</html>
By the way I think you don't need define Button Click event. Already defined path with variable. Just convert button to Link Button and remove Button Click Event

AutoPostBack on Checkbox Checked

//C# Code
protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
{
TextBox2.Text = TextBox1.Text;
}
<h2 style="font-style: italic">
<asp:Label ID="Label5" runat="server" Text="Residental Address : "></asp:Label>
<asp:TextBox ID="TextBox1" runat="server" TextMode="MultiLine"></asp:TextBox>
</h2>
<h2 style="font-style: italic">
<asp:CheckBox ID="CheckBox1" runat="server" AutoPostBack="True" oncheckedchanged="CheckBox1_CheckedChanged" Text="Both Same" />
</h2>
<h2 style="font-style: italic">
<asp:Label ID="Label9" runat="server" Text="Native Address :"></asp:Label>
<asp:TextBox ID="TextBox2" runat="server" TextMode="MultiLine"></asp:TextBox>
</h2>
if residental address is same so on clicking on checkbox it must autopostback it to native address its but i tried and it showed blank

Did you follow the PageLoad event after clicking on checkbox, and see if textbox is getting reset somewhere in your code?
otherwise it should work.

Keep value after postback updatepanel

I have a textbox which is inside a updatepanel -> detailsview. When I click insert I basically call a method to update DB. Now I'm trying to save the value typed in the textbox in the textbox so I don't lose it.
Shortly I wanna set the textbox value, with the value that is inserted.
My aspx:
<asp:UpdatePanel runat="server" ID="insert" UpdateMode="Conditional">
<ContentTemplate>
<table>
<tr>
<Fields>
<td class="style1">
<asp:DetailsView ID="DetailsView1" runat="server" Height="50px" Width="500px" AutoGenerateRows="False"
DataKeyNames="strPositionId,nFolderId,tmVaRPosition" DataSourceID="ODSManualPosVaR"
OnItemInserted="DetailsView1_ItemInserted" OnItemInserting="DetailsView1_ItemInserting"
DefaultMode="Insert" SkinID="detailsviewSkin" EnableModelValidation="True">
<asp:TemplateField HeaderText="Name" SortExpression="strPositionName">
<InsertItemTemplate>
<asp:TextBox ID="strPositionName" Width="380px" MaxLength="49" runat="server" Text='<%# Bind("strPositionName") %>'></asp:TextBox>
</InsertItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Width="380px" Text='<%# Bind("strPositionName") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
</asp:DetailsView>
</td>
</Fields>
</tr>
</table>
</ContentTemplate>
</asp:UpdatePanel>
My Page_Load:
protected new void Page_Load(object sender, EventArgs e)
{
base.Page_Load(sender, e);
strSystemId = Request["nSystemId"];
CheckPermission(strSystemId);
if (!IsPostBack || !PageHeader1.SystemId.Equals(strSystemId))
{
RefreshGrid();
DetailsView1.DataBind();
}
}
When click insert:
protected void DetailsView1_ItemInserted(object sender, DetailsViewInsertedEventArgs e)
{
UpdateDB();
//Trying to store the textbox value in a session variable
Session["Test"] = ((TextBox)DetailsView1.FindControl("strPositionName")).Text;
KeepValues();
}
KeepValues:
private void KeepValues()
{
var txtName = (TextBox)DetailsView1.FindControl("strPositionName");
var name = Session["Test"].ToString();
txtName.Text = name;
}
When I debug it stops at KeepValues and the Session variable is working. But I still can't set the textbox.text to it.
Why does this not work? Is it because of a postback? All I want is the value inside strPositionName to be stored in a variable (working) and then set as textbox.text