ASP.NET

18-May-09 10:38

In my site i have a div to represent a blog post like below

<div class="post">
    <div class="header">
        <h3>Header</h3>
        <div class="date">May 18, 2009</div>
    </div>
    <div class="content">
        Some Content
    </div>
</div>

Basically, what i'm wanting to do is select the 10 recent posts from a database and build the page with these posts using the div tags above. I can already do the easy things like setting the header, date, and content.

Thanks,

Don't be overcome by evil, but overcome evil with good

Yusuf18-May-09 11:54

Yusuf

18-May-09 11:54

So, what is your question?

Yusuf
May I help you?

teejayem18-May-09 12:01

18-May-09 12:01

what i can't figure out is how to create dynamically create div's for each post (as opposed to hardcoding them in the aspx file).

Don't be overcome by evil, but overcome evil with good

teejayem18-May-09 12:41

18-May-09 12:41

I think i figured it out. The solution i found is something like this:

(i know this won't generate the markup in the original post, this is in a seperate test project)

ContentPlaceHolder leftContent = (ContentPlaceHolder)Master.FindControl("leftContent");

HtmlGenericControl div = new HtmlGenericControl("div");
div.Attributes.Add("class", "post");

HtmlGenericControl h2 = new HtmlGenericControl("h2");
h2.InnerText = "My Header";

HtmlGenericControl p = new HtmlGenericControl("p");
p.InnerText = "This is some  content.";

div.Controls.Add(h2);
div.Controls.Add(p);

leftContent.Controls.Add(div);

which will then generate this:

<div class="post"><h2>My Header</h2><p>This is some  content.</p></div>

Is there a better way to achieve what i'm trying to do? I feel like i'm going against the grain here.

Don't be overcome by evil, but overcome evil with good

PauloCastilho18-May-09 12:52

PauloCastilho

18-May-09 12:52

Use asp.net repeater control.

<asp:Repeater id="rPOSTS" runat="server">
	<ItemTemplate>
	</ItemTemplate>
<asp:Repeater>

On ItemTemplate you will put the code you want to repeat X times.

So, in code behind you will do something like this:
rPOSTS.DataSouce = YOUR_DB_DATA;
rPOSTS.DataBind();

See more about repeater control in Google[^].

teejayem18-May-09 13:22

Write to CSV in C# asp.net

18-May-09 13:22

Sweet! That was easy enough Smile | :)

For future readers this is the result that paulo helped me come up with

in the aspx file:

<asp:Repeater runat="server" ID="postRepeater">
    <HeaderTemplate>
        <div class="post">
    </HeaderTemplate>
    <ItemTemplate>
        <h2>
            <%#DataBinder.Eval(Container.DataItem, "Header")%></h2>
        <p>
            <%#DataBinder.Eval(Container.DataItem, "Content")%></p>
    </ItemTemplate>
    <FooterTemplate>
        </div>
    </FooterTemplate>
</asp:Repeater>

and in the code behind:

System.Data.DataTable dt = new System.Data.DataTable("Posts");
dt.Columns.Add(new System.Data.DataColumn("Header"));
dt.Columns.Add(new System.Data.DataColumn("Content"));

System.Data.DataRow row = dt.NewRow();

row[0] = "Header 1";
row[1] = "Content 1";

dt.Rows.Add(row);

postRepeater.DataSource = dt;
postRepeater.DataBind();

Thanks again Smile | :)

Don't be overcome by evil, but overcome evil with good

Civic0618-May-09 7:50

Civic06

18-May-09 7:50

If i have a string that contains a comma how do i write that to a csv file without it thinking they are two different words?

Re: Write to CSV in C# asp.net

ToddHileHoffer18-May-09 8:16

ToddHileHoffer

18-May-09 8:16

use a text qualifier. 'joe, blow', 'money, its good', 'do you see a pattern'

I didn't get any requirements for the signature

Re: Write to CSV in C# asp.net

Civic0619-May-09 4:21

Civic06

19-May-09 4:21

It doesn't work. It thinks its two different values and places them in two different cells

Re: Write to CSV in C# asp.net

ToddHileHoffer19-May-09 4:37

ToddHileHoffer

19-May-09 4:37

If you want to write something for Excel, do something like this...

   System.Data.DataTable DT = TankBookWeb.sqlDataObjects.GetInquiryDetailExcel();
            if (DT != null)
            {

                  //clear anything in io buffer
                  Response.Clear();
                  //set to excel for to save file.
               // Response.AddHeader("Content-Disposition", "attachment;filename=TankBookExport.xls");
                  Response.Charset = "";
                  Response.ContentType = "application/vnd.ms-excel";

                  //write columns
                  string tab = "";
                  foreach (DataColumn dc in DT.Columns)
                  {
                        Response.Write(tab + dc.ColumnName);
                        tab = "\t";
                  }
                  Response.Write("\n");

                  //write rows
                  int i;
                  foreach (DataRow dr in DT.Rows)
                  {
                        tab = "";
                        for (i = 0; i < DT.Columns.Count; i++)
                        {
                              Response.Write(tab + dr[i].ToString());
                              tab = "\t";
                        }
                        Response.Write("\n");
                  }
                  Response.End();
            }

As for the csv, you need to tell what program you are using to open the file that their is text qualifier.

I didn't get any requirements for the signature

Why does button’s click subroutine not execute when RequiredFieldValidator is false?

bigmish218-May-09 4:18

Re: Why does button’s click subroutine not execute when RequiredFieldValidator is false?

18-May-09 4:18

I’ve got a simple page that should display the string “OK” when the user clicks the button. It works fine untill I put a RequiredFieldValidator on the page. Now it seems like there is an implicit conditional in the source code that prevents the “OK” from being displayed unless the text box has text in it. I put no such conditional in the code; why is it behaving like this?

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="pageIsValidTest.aspx.vb" Inherits="pageIsValidTest" %>

<!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 runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
         Textbox:
        <asp:TextBox ID="TextBox" runat="server"></asp:TextBox>
        <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="TextBox"
            ErrorMessage="enter text"></asp:RequiredFieldValidator><br />
        <asp:Button ID="Button1" runat="server" Text="Button" /><br />
        Label:
        <asp:Label ID="Label" runat="server"></asp:Label></div>
    </form>
</body>
</html>

Partial Class pageIsValidTest
    Inherits System.Web.UI.Page

    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        Label.Text = "OK"
    End Sub
End Class

Ian McCaul18-May-09 4:47

Ian McCaul

18-May-09 4:47

That is because the RequiredFieldValidator has the ControlToValidate set to the text box. It is working as it should, if no text is in the ControlToValidate the RequiredFieldValidator will prevent your server side code from running.

Re: Why does button’s click subroutine not execute when RequiredFieldValidator is false?

bigmish218-May-09 5:04

Re: Why does button’s click subroutine not execute when RequiredFieldValidator is false?

18-May-09 5:04

Thanks! Didn’t mention that in the book I’m using so I was confused.

But then what is the point of Page.IsValid? If the server side code will only run if all Validators are true then it seems that it would be impossible to get a false Page.IsValid…

What if I want server side code to do something if the form isn't valid, is there a way to override this behavior?

El_Programmer18-May-09 5:25

El_Programmer

18-May-09 5:25

You can change the "Causesvalidation" of your button to "False" , so it will work without fire the Validators.
i hope it help you.

Re: Why does button’s click subroutine not execute when RequiredFieldValidator is false?

bigmish218-May-09 6:06

Re: Why does button’s click subroutine not execute when RequiredFieldValidator is false?

18-May-09 6:06

Thanks you for the response but not quite what I am looking for. I’m looking for a way to run the source code and within that source code programmatically determine if the page is valid (meaning a validaters = true) and do something it is and something else if its not.

El_Programmer18-May-09 6:31

El_Programmer

18-May-09 6:31

ok. But you must be more explicit,ex: what are you doing in the page before you do that request?

Re: Why does button’s click subroutine not execute when RequiredFieldValidator is false?

N a v a n e e t h18-May-09 6:37

N a v a n e e t h

18-May-09 6:37

Page.IsValid is used to check the validation status at server side. Validation control uses JS by default to do the validation. Since JS is not reliable, ASP.NET does server side validations also to make sure validation logic is not bypassed and set the IsValid flag. So before you continue with your action, check the page is valid. Something like

If(this.IsValid)
   // continue

bigmish2 wrote:
I’m looking for a way to run the source code and within that source code programmatically determine if the page is valid (meaning a validaters = true) and do something it is and something else if its not.

When validator controls are added, by default the validation will happen at the client side. So validating programatically at server side is pointless as form will not postback if there are validation errors. To do the validations on server, you have to disable client side validations first. Set the EnableClientScript property of the validation control to false.

Page class exposes a Validators[^] collection where you can iterate and call Validate() method on each validator to perform the validation. Check the IsValid property to get the status of validation.

Smile | :)

Navaneeth

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Re: Why does button’s click subroutine not execute when RequiredFieldValidator is false?

bigmish218-May-09 7:21