We Keep Coding

How to change the css styles dynamically

I am trying to change the css style of the repeater to a different color on different status. The expected output is to print 6 different statuses like: In progress, complete, withdrawn so on.. Currently it has a single color, so it shows one color only. the challenging part here is to change the color dynamically based on the status. how do I achieve this? Currently it pulls the style based on "status noAction text-center" class below. Should I make any changes in the code behind or is it just a front end css change. Can someone provide me an example please.
.aspx code:
<div class="row">
<asp:Repeater ID="rptStatuses" runat="server">
<ItemTemplate>
<div class="col-md-4 col-sm-4">
<div class="status noAction text-center">
<div class="banner">
<asp:Label runat="server"> <%# Eval("ID") %></asp:Label>
</div>
<div class="label"><%# Eval("Name") %></div>
</div>
</div>
</ItemTemplate>
</asp:Repeater>
.cs code relevant part
private void GB()
{
var surveyId = 55;
var stateLabels = _manageDatasets.GetStateLabels(surveyId);
List<Status> statusesList = new List<Status>();
foreach (var sl in stateLabels)
{
if (sl.Key != -1)
statusesList.Add(new Status { ID = sl.Key.ToString(), Name = sl.Value }
);
}
this.rptStatuses.DataSource = statusesList;
this.rptStatuses.DataBind();
}

I think what you want to do is change the class in the your html and just use the embedded code to be able to dynamically change the banner color, etc. based on the status. The embedded code that you want would look something like this -
<div class="col-md-4 col-sm-4">
<% if(status == "noAction") { %>
<div class="status noAction text-center">
<div class="banner">
<asp:Label runat="server"> <%# Eval("ID") %></asp:Label>
</div>
<div class="label"><%# Eval("Name") %></div>
</div>
<% } %>

If you have any column in you table from where repeater is getting datasource then that would be pretty easy to do
something like that
<asp:Repeater ID="rptStatuses" runat="server">
<ItemTemplate>
<div class="col-md-4 col-sm-4">
<div class='<%# Convert.toInt32(eval("ActionColumnName"))==1 ? "status In progress text-center" : Convert.toInt32(eval("ActionColumnName"))==2 ? "status complete text-center" : Convert.toInt32(eval("ActionColumnName"))==3 ? "status withdrawn text-center" : "status noAction text-center" '>
<div class="banner">
<asp:Label runat="server"> <%# Eval("ID") %></asp:Label>
</div>
<div class="label"><%# Eval("Name") %></div>
</div>
</div>
</ItemTemplate>
</asp:Repeater>

How to loop div?

I am trying to loop few div's in aspx. This the code I would like to loop:
<div class="col-md-3 product-men">
<div class="men-pro-item simpleCart_shelfItem">
<div class="men-thumb-item">
<img src="uploadImage/3.png" class="pro-image-front" />
<img src="uploadImage/3.png" class="pro-image-back" />
</div>
<div class="item-info-product ">
<h4>Tie Clip</h4>
<div class="info-product-price">
<span class="item_price">RM100</span>
</div>
Add to cart
</div>
</div>
</div>
The page looks like below:
the cart need to loop. I have tried using c# as below:
StringBuilder cart = new StringBuilder();
for (int x = 0; x < 3; x++) {
cart.Append(" <div class=\"col - md - 3 product - men\">");
cart.Append("<div class=\"men - pro - item simpleCart_shelfItem\">");
cart.Append("<div class=\"men - thumb - item\">");
cart.Append("<img src = uploadImage/1.jpg class='pro - image - front />");
cart.Append("<img src = uploadImage/1.jpg class=pro - image - back />");
cart.Append("</div>");
cart.Append(" <div class=\"item - info - product \">");
cart.Append("<h4><a href = \"single.html\" > Tie Clip</a></h4>");
cart.Append("<div class=\"info - product - price\">");
cart.Append("<span class=\"item_price\">RM100</span>");
cart.Append("</div>");
cart.Append("Add to cart");
cart.Append("</div>");
cart.Append("</div>");
cart.Append("</div>");
}
Literal1.Text = cart.ToString();
This don't seem work out.. Any idea how to get this cart loop?

You should use Embedded Code Blocks in the .aspx itself instead of .cs.

You would normally use a asp.net Control for that, like a Repeater.
<asp:Repeater ID="Repeater1" runat="server">
<ItemTemplate>
<div class="col-md-3 product-men">
<div class="men-pro-item simpleCart_shelfItem">
<div class="men-thumb-item">
<img src="uploadImage/<%# Eval("product_image_front") %>" class="pro-image-front" />
<img src="uploadImage/<%# Eval("product_image_back") %>" class="pro-image-back" />
</div>
<div class="item-info-product ">
<h4><%# Eval("product_name") %></h4>
<div class="info-product-price">
<span class="item_price"><%# Eval("product_price") %></span>
</div>
<asp:LinkButton ID="LinkButton1" CommandArgument='<%# Eval("product_id") %>' runat="server" CssClass="item_add single-item hvr-outline-out button2">Add to cart</asp:LinkButton>
</div>
</div>
</div>
</ItemTemplate>
</asp:Repeater>
Then in code behind you would assign a DataSource to the Repeater.
Repeater1.DataSource = source;
Repeater1.DataBind();

Code in aspx Page
<asp:Literal ID="ltrMessage" runat="server"></asp:Literal>
Code Snippet in cs page.
for(int i=0;i<limit;i++)
{
ltrMessage.Text+=#"<div class='col-md-3 product-men'>
<div class='men-pro-item simpleCart_shelfItem'>
<div class='men-thumb-item'>
<img src='uploadImage/3.png' class='pro-image-front' />
<img src='uploadImage/3.png' class='pro-image-back' />
</div>
<div class='item-info-product '>
<h4><a href='single.html'>Tie Clip</a></h4>
<div class=''info-product-price'>
<span class='item_price'>RM100</span>
</div>
<a href='#' class='item_add single-item hvr-outline-out button2'>Add to cart</a>
</div>
</div>
</div>";
}

Show product details in page

I need to show products details in a page.
My aspx is like below...
<div class="col-xs-12 col-sm-4 no-margin product-item-holder hover"> <!-- this div will be repeated for each product -->
<div class="product-item">
<div class="image">
<img runat="server" id="img" alt="" src="" />
</div>
<div class="body">
<div class="label-discount clear"></div>
<div class="title">
<a runat="server" id="name" href="single-product.html"></a>
</div>
</div>
<div class="prices">
<div class="price-prev"></div>
<div runat="server" id="price" class="price-current pull-right"></div>
</div>
<div class="hover-area">
<div class="add-cart-button">
Enquiry
</div>
</div>
</div>
and my codebehind is like below...
dbConnection cn = new dbConnection();
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
getLoopData();
}
}
public void getLoopData()
{
cn.con.Open();
cn.cmd.Connection = cn.con;
cn.cmd.CommandText = "select * FROM products";
MySqlDataReader reader = cn.cmd.ExecuteReader();
while (reader.Read())
{
//int id = reader.GetInt32(0);
name.InnerText = reader["InventionName"].ToString();
price.InnerText = reader["Price"].ToString();
img.Src = reader["Picture"].ToString();
}
reader.Close();
cn.con.Close();
}
But it is showing only last product details.
How should I repeat the div for each product and how to show every products in page ??

You can use Asp Repeater to do that.
Check this link out : http://www.w3schools.com/aspnet/aspnet_repeater.asp

You need a datagrid control, repeater or similar to show tabular data.
Right now you only have one control per attribute to show all records, that's why last one wins.

Your view/page could be like this:
<asp:Repeater ID="ProductRepeater" runat="server" EnableViewState="False">
<ItemTemplate>
<div class="product-item">
<div class="image">
<img id="img" alt="" src='<%# Eval("Picture") %>' />
///...
</ItemTemplate>
</asp:Repeater>
In your code you could do this:
cn.con.Open();
cn.cmd.Connection = cn.con;
cn.cmd.CommandText = "SELECT InventionName, Price, Picture FROM products";
MySqlDataReader reader = cn.cmd.ExecuteReader();
ProductRepeater.DataSource = reader;
ProductRepeater.DataBind();

You are iterating a list, and assigning data to name, price and img.Src, but you overwrite the values on each iteration, therefore you only have the values from the last element.
You should bind you data source (reader) to an <asp:Repeater>'s DataSource property. In your markup you specify a header (HeaderTemplate), a footer (FooterTemplate) and content (ItemTemplate). You can omit the header and footer template if you don't need them. You can also use an AlternatingItemTemplate if you need to do different things with odd/even rows (e.g. alternating row color in a table).
You can access properties of the databound datatype using the <%# Eval("SomeProperty") %> which is a databinding expression.
HTML markup would be something like this:
<asp:Repeater id="Products" runat="server">
<HeaderTemplate>
</HeaderTemplate>
<ItemTemplate>
<div class="col-xs-12 col-sm-4 no-margin product-item-holder hover"> <!-- this div will be repeated for each product -->
<div class="product-item">
<div class="image">
<img class="img" alt="" src="<%# Eval("Picture") %>" />
</div>
<div class="body">
<div class="label-discount clear"></div>
<div class="title">
<a class="name" href="single-product.html"><%# Eval("InventionName") %></a>
</div>
</div>
<div class="prices">
<div class="price-prev"></div>
<div class="price" class="price-current pull-right"><%# Eval("Price") %></div>
</div>
<div class="hover-area">
<div class="add-cart-button">
Enquiry
</div>
</div>
</div>
</div>
</ItemTemplate>
<FooterTemplate>
</FooterTemplate>
</asp:Repeater>
and wire up the datasource in codebehind like this:
cn.con.Open();
cn.cmd.Connection = cn.con;
cn.cmd.CommandText = "select * FROM products";
MySqlDataReader reader = cn.cmd.ExecuteReader();
Products.DataSource = reader; // rather than iterating manually, you assign the datasource to the repeater.
Products.DataBind();
reader.Close();
cn.con.Close();
Side note: I changed the attribute from id to class on the name, price and img element. Because when this markup is rendered it would have been with multiple elements with the same id, which it shouldn't since id is supposed to be unique according to specification.

ASP.NET Repeater has a null value

I'm using ASP.NET Repeater for dynamically generating HTML code and pagination. I use totally same code on two aspx pages and on one all works fine, but on the other one I get an Exception: Object reference not set to an instance of an object.
Now I understand why the exception occurred, it simply has a null value, repeater didn't render I guess. But does anyone know why this error happened and how it's possible that it works on one page, and doesn't work on the other? Where should I look for "real" problem?
This is my HTML code on the aspx page:
<div class="accordion-wrap projects">
<asp:Repeater runat="server" ID="projectRepeter">
<ItemTemplate>
<div class="item">
<div class="heading">
<span>
<asp:Label runat="server" ID="TeamMemberName" Text='<%#Eval("ProjectName")%>'></asp:Label></span><span><em>x</em></span>
<i>+</i>
</div>
<div class="details">
<ul class="form">
<li>
<label>Project name:</label>
<input type="text" class="in-text" value="<%#Eval("ProjectName")%>" />
</li>
<li>
<label>Lead:</label>
<asp:DropDownList runat="server" DataSourceID="TeamMemberNameDS"></asp:DropDownList>
</li>
</ul>
<ul class="form">
<li>
<label>Description:</label>
<input type="text" class="in-text" value="<%#Eval("Description")%>" />
</li>
</ul>
<ul class="form last">
<li>
<label>Customer:</label>
<asp:DropDownList runat="server" DataSourceID="ClientNameDS"></asp:DropDownList>
</li>
<li class="inline">
<label>Status:</label>
<span class="radio">
<label for="inactive">Active:</label>
<input type="radio" value="1" name="status" id="inactive" />
</span>
<span class="radio">
<label for="active">Inactive:</label>
<input type="radio" value="2" name="status" id="active" />
</span>
<span class="radio">
<label for="active">Archive:</label>
<input type="radio" value="3" name="status" id="Radio1" />
</span>
</li>
</ul>
<div class="buttons">
<div class="inner">
Save
Delete
</div>
</div>
</div>
</div>
</ItemTemplate>
</asp:Repeater>
</div>
<div class="pagination">
<asp:Repeater ID="rptPagingProject" runat="server" OnItemCommand="rptPaging_ItemCommand">
<ItemTemplate>
<asp:LinkButton ID="btnPage"
CommandName="Page" CommandArgument="<%# Container.DataItem %>" runat="server" ForeColor="Black" Font-Bold="True"><%# Container.DataItem %>
</asp:LinkButton>
</ItemTemplate>
</asp:Repeater>
</div>
And this is the code behind:
protected void BindRepeater()
{
string ConnectionString = "Data Source=PRACTICE-001;Initial Catalog=n.mosorinski;User ID=n.mosorinski;Password=n.mosorinski;MultipleActiveResultSets=True;Application Name=EntityFramework";
SqlConnection con = new SqlConnection(ConnectionString);
SqlCommand cmd = new SqlCommand("SELECT p.ProjectName, p.Description, c.ClientName FROM Project AS p INNER JOIN Client AS c ON p.CustomerID = c.ClientID", con);
if (con.State == ConnectionState.Closed)
{
con.Open();
}
DataTable dt = new DataTable();
SqlDataAdapter adp = new SqlDataAdapter(cmd);
adp.Fill(dt);
PagedDataSource pgitems = new PagedDataSource();
DataView dv = new DataView(dt);
pgitems.DataSource = dv;
pgitems.AllowPaging = true;
pgitems.PageSize = 5;
pgitems.CurrentPageIndex = PageNumber;
if (pgitems.PageCount > 1)
{
rptPagingProject.Visible = true;
ArrayList pages = new ArrayList();
for (int i = 0; i < pgitems.PageCount; i++)
pages.Add((i + 1).ToString());
rptPagingProject.DataSource = pages;
rptPagingProject.DataBind();
}
else
{
rptPagingProject.Visible = false;
}
projectRepeter.DataSource = pgitems;
projectRepeter.DataBind();
}
public int PageNumber
{
get
{
if (ViewState["PageNumber"] != null)
return Convert.ToInt32(ViewState["PageNumber"]);
else
return 0;
}
set
{
ViewState["PageNumber"] = value;
}
}
protected void rptPaging_ItemCommand(object source, RepeaterCommandEventArgs e)
{
PageNumber = Convert.ToInt32(e.CommandArgument) - 1;
BindRepeater();
}
}

embed string in the html

Asp.net c#
I am using the below code..
<%String h = "hello";%>
<!-- "wall_com_insert.aspx?Tid=" + Application.Get("Tid");-->
<div id="content_sr_comment" style="height: auto"> <asp:Label ID="Label8"
runat="server" Text="<%=h%>" ></asp:Label>
</div>
But I am getting the output..
output displayed on the label: "<%=h%>"
I guess the syntax is not correct.. can I get help

You can't place a server command inside a server tag. Try this:
<div id="content_sr_comment" style="height: auto"> <%= h %></div>
Or
<script runat="server" language="C#">
void Page_Load(object sender, EventArgs e)
{
String h = "hello";
Label8.Text = h;
}
</script>
<div id="content_sr_comment" style="height: auto">
<asp:Label ID="Label8" runat="server"></asp:Label>
</div>

This should work:
<script runat="server" language="C#">
private string h = "hello";
</script>
<!-- "wall_com_insert.aspx?Tid=" + Application.Get("Tid");-->
<div id="content_sr_comment" style="height: auto"> <asp:Label ID="Label8"
runat="server"><%=h%></asp:Label>
</div>

Another approach that I find useful, especially if you want to write out a value in multiple places in your html is to create a function in your code behind like this:
protected string SayHello()
{
return "Hello";
}
You can then use it all over your html:
<div id="content_sr_comment" style="height: auto">
<%=SayHello() %>
</div>