ASP.NET Discussion Boards

Re: Treeview indentation not proper for last node

pranilrao29-Dec-09 11:47

pranilrao

29-Dec-09 11:47

This is resolved.

It happens since

NodeIndent="1"

Thanks,
Pranil

How to write user control ?

paper6728-Dec-09 5:56

paper67

28-Dec-09 5:56

Hi,

I have tried to construct a user control named EventCategory, that holds 2 dropdownlists
to select an event category. Depending on the selection in the first dropdownlist, the second
dropdownlist must be repopulated with items corresponding with the first dropdownlist selection.
Here is my control :

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="EventCategory.ascx.cs" Inherits="EventCategory" %>

<table border="0">
<tr>
<td style="width: 65px"><asp:Label ID="CategoryLabel" runat="server" Text="Category:" AssociatedControlID="CategoryList" /></td>
<td>
<asp:DropDownList ID="CategoryList" runat="server" Width="130px" AutoPostBack="True"
OnSelectedIndexChanged="CategoryList_SelectedIndexChanged" />
</td>
<td style="width: 20px" />
<td style="width: 90px"><asp:Label ID="SubCategoryLabel" runat="server" Text="SubCategory:" AssociatedControlID="SubCategoryList" /></td>
<td>
<asp:DropDownList ID="SubCategoryList" runat="server" Width="130px" />
</td>
</tr>
</table>

When i enter the control in a web page, I can wite something like this :

....
<UC:EventCategory ID="EventCategory" runat="server" SelectText="«Select»" Category="Parties" />

Here I want the "Parties" item to be initial selected in the CategoryList control when the page comes up.

therefore I wrote the following in code behind :

public partial class EventCategory : System.Web.UI.UserControl
{
#region Private data members

private string m_strCategory = string.Empty;
private string m_strSubCategory = string.Empty;

#endregion

#region Public properties

[Category("Appearance"),
DefaultValue(""),
Description("The event category associated with the user control.")]
public string Category
{
get { return ((CategoryList.SelectedItem != null) && (CategoryList.SelectedItem.Value != "0") ? CategoryList.SelectedItem.Text : string.Empty).Trim(); }
set { m_strCategory = value.Trim(); }
}

[Category("Appearance"),
DefaultValue(""),
Description("The event subcategory associated with the user control.")]
public string SubCategory
{
get { return ((SubCategoryList.SelectedItem != null) && (SubCategoryList.SelectedItem.Value != "0") ? SubCategoryList.SelectedItem.Text : string.Empty).Trim(); }
set { m_strSubCategory = value.Trim(); }
}

[Category("Appearance"),
DefaultValue(""),
Description("The selection text shown as first item in the user control's lists.")]
public string SelectText
{
get
{
object obj = ViewState["EventCat_SelectText"];
if (obj == null)
return string.Empty;
else
return (string)obj;
}

set { ViewState["EventCat_SelectText"] = value; }
}
#endregion

#region Public functions

public void Initialize()
{
PopulateCategoryList();

SubCategoryLabel.Enabled = false;
SubCategoryList.Enabled = false;
}

#endregion

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
Initialize();
}

protected void CategoryList_SelectedIndexChanged(object sender, EventArgs e)
{
int nCatId = Int32.Parse(CategoryList.SelectedValue);

if (nCatId > 0)
PopulateSubCategoryList(nCatId);
else
{
SubCategoryList.Items.Clear();
SubCategoryLabel.Enabled = false;
SubCategoryList.Enabled = false;
}
}

protected override void OnPreRender(EventArgs e)
{
base.OnPreRender(e);

if (!IsPostBack)
{
if (m_strCategory != string.Empty)
ListControlHelper.SelectListText(CategoryList, m_strCategory);

int nCatId = Int32.Parse(CategoryList.SelectedValue);

if (m_strSubCategory != string.Empty)
{
PopulateSubCategoryListOnEmpty(nCatId);
ListControlHelper.SelectListText(SubCategoryList, m_strSubCategory);
}
}
}

#region Private helpers

private int PopulateCategoryList()
{
EventCatsTableAdapter Adapter = new EventCatsTableAdapter();

CategoryList.DataSource = Adapter.GetAllEventCats();
CategoryList.DataTextField = "CatName";
CategoryList.DataValueField = "CatId";

CategoryList.DataBind();

if (CategoryList.Items.Count > 0)
ListControlHelper.AddListItem(CategoryList, SelectText, "0");
else
throw new InvalidOperationException(string.Format("{0} in user control {1} is empty.", CategoryList.ID, ID));

return CategoryList.Items.Count;
}

private int PopulateSubCategoryListOnEmpty(int nCatId)
{
if (SubCategoryList.Items.Count > 0)
return SubCategoryList.Items.Count;

return PopulateSubCategoryList(nCatId);
}

private int PopulateSubCategoryList(int nCatId)
{
if (!SubCategoryLabel.Enabled)
SubCategoryLabel.Enabled = true;
if (!SubCategoryList.Enabled)
SubCategoryList.Enabled = true;

EventSubCatsTableAdapter Adapter = new EventSubCatsTableAdapter();

SubCategoryList.DataSource = Adapter.GetEventSubCatsByCatId(nCatId);
SubCategoryList.DataTextField = "SubCatName";
SubCategoryList.DataValueField = "SubCatId";

SubCategoryList.DataBind();

if (SubCategoryList.Items.Count > 0)
ListControlHelper.AddListItem(SubCategoryList, SelectText, "0");
else
throw new InvalidOperationException(string.Format("{0} in user control {1} is empty.", SubCategoryList.ID, ID));

return SubCategoryList.Items.Count;
}

#endregion
}

This works fine for a simple web page, but when i place the user control in a InsertItemTemplate of a FormView and I change the
mode of the FormView to FormViewMode.Insert by an ImageButton in the page where the FormView is located I can not initial select
a dropdownlist item through the Category property of the user control. I know it is because the formview is switched to insert mode during
a postback so the IsPostBack block of the OnPreRender override gets skipped. Is there a better way to wtite the user control so that I can
select an initail value in a dropdownlist that works also in a template of a FormView.

TIA

Using FaceBook in ASP

Anil Kumar.Arvapalli28-Dec-09 3:36

Anil Kumar.Arvapalli

28-Dec-09 3:36

I want to use the Face book and organize the FaceBook data (Friends,Comments,Posts) into my application. so how do i get it any samples regrding it.. Please let me know i will g0 through it.... Thanks

Re: Using FaceBook in ASP

sashidhar28-Dec-09 6:13

sashidhar

28-Dec-09 6:13

Are You Talking Abt This..!
http://wiki.developers.facebook.com/index.php/User:ASP.NET[^]
Facebook Application Development with FBML, FBJS, ASP.NET and C#[^]

LatestArticle :Log4Net
Why Do Some People Forget To Mark as Answer .If It Helps.

Database searching

sv_vasja28-Dec-09 1:17

sv_vasja

28-Dec-09 1:17

Hello,

I am trying to pass parametarst from one page to another(based on users search) and get results from the database accordingly.

Response.Redirect("~/TestPage.aspx?" + "Test1=" + Server.UrlEncode(comboTest1.Text) + "&Test2=" + Server.UrlEncode(comboTest2.Text));

The user can specify value in the one combo or in the both.

if (Request.QueryString["Test1"] != null || Request.QueryString["Test2"] != null)
{ SelectData(Request.QueryString["Test1"], Request.QueryString["Test2"]); }

DataClassesDataContext db = new DataClassesDataContext();
public IQueryable SelectData(string Test1Query, string Test2)
{
   IQueryable data = from t1 in db.Test1
                     join t2 in db.Test2on t1.ID equals t2.fkTest1 into Joined
                     from j in Joined.DefaultIfEmpty()
                     where t1.Manufacturer == Manufacturer || c.Model == Model )
                     select new { ID = t1.ID, Test1 = t1.Field1, Test2 = j.Field2 };
   return data;
 }

If the user select only (||) value for the one combo and not the other, the code is not working. How do i fix this? I want the users to be able to perform searches by selecting values from provided number of comboboxes by their own choice.

vasja

Re: Database searching

ProtoBytes28-Dec-09 12:33

ProtoBytes

28-Dec-09 12:33

Okay I think I understand what you are asking.

What is wrong with my code why can I get the LINQ to work when the user only selects one and not the other?

Well, I think The problem is the 'if' logic or the 'SelectData' method logic depending how you look at it.

I would make the logic smarter and have values substituted if they are not in range of the query.

-or-

Modify the 'SelectData' method to account for different data dependencies.

~TheArch

Re: Database searching

sv_vasja28-Dec-09 21:19

sv_vasja

28-Dec-09 21:19

Thank you for your reply. The problem is i get an exception whenever i request the two querystrings and one of them has a null value...

Re: Database searching [Null Values]

ProtoBytes29-Dec-09 3:27

ProtoBytes

29-Dec-09 3:27

Correct! You will need to supply either corrective logic, or correct the data values before they are passed.

IE:

//corrective logic...
MyMethod(String s1, String s2) 
{
  //Modify the data before it get's passed...
  if(s1 == null)
   s1 = '';
  if(s2 == null)
   s2 = '';

  //Modify the LINQ query...
  if(s1 == null && s2 == null)
   //LINQ for double null
  else if(s1 != null && s2 != null)
   //LINQ for s1 and s2
  else if(s1 != null && s2 == null)
   //LINQ for s1 and no s2
  else if(s1 == null && s2 != null)
   //LINQ for no s1 and s2
}

as you can see the second method is more complicated. However you could also dynamically build the LINQ query and have the LINQ run correctly for any situation.

~TheArch

Re: Database searching [Null Values]

sv_vasja29-Dec-09 21:35

sv_vasja

29-Dec-09 21:35

Yes i agree with the

if(s1 == null)
  s1 = '';
 if(s2 == null)
  s2 = '';

but its like 20 values and i tough there is something smarter than this...i would probably use it.
Thanks!

Re: Database searching [Null Values]

ProtoBytes30-Dec-09 3:30

ProtoBytes

30-Dec-09 3:30

Well the example only lists the two values.

If there are many values the dynamic LINQ would still do this, just build the query for the values you do have.

Another way to do it might be to change the input to the LINQ method to take an array.

static void myLINQ(String[] s)
{
  for(int i=0;i<s.Count;i++)
  {
    if(s[i] == null)
      s[i] = "";
  }

  //Then build the LINQ dynamically...
}

There are several example here on The Code Project on Dynamic LINQ:

Dynamic LINQ Queries[^]

Google friendly search:

Dynamic LINq c# site:codeproject.com

Online Update Issue!

Sr...Frank27-Dec-09 23:54

Sr...Frank

27-Dec-09 23:54

Hi,

I was working on a desktop application basically it’s a product now the programming part is over and I have created MSI for this product.
So product and setup both parts are ready but now I have one issue with online updates for this product. I am planning to create a web service for online updates but I would like to know your thoughts as you guys are experienced.
I have used VisualStudio2008, language C# and setup and deployment project.
Please let me know, how to integrate it with setup and deployment project or with programming part or if any other right way for online updates.

Thanks

Re: Online Update Issue!

Sr...Frank28-Dec-09 4:53

Sr...Frank

28-Dec-09 4:53

Updates should be download automatically from server.Please let me know how to implement it.

Row should be bold in SSRS

siddisagar27-Dec-09 20:27

siddisagar

27-Dec-09 20:27

Hi Team,

I want to show one row as bold in my SSRS report. That row is static always but it can change the row no. Ex some times it may come in second sometimes it may come in 5th. but the row is constant always this needs to show in bold

So how to handle this problem

Thanks

Re: Row should be bold in SSRS

sashidhar27-Dec-09 21:27

sashidhar

27-Dec-09 21:27

Hi,

What Is the condition? for the row to show as bold..!
Make use of iif Loop ..!
in the expression of the row font..!
way to do it..!
right click on the row go to properties go to font
and write the expression..
check this lnk for expressions
http://msdn.microsoft.com/en-us/library/ms157328.aspx[^]

LatestArticle :Log4Net
Why Do Some People Forget To Mark as Answer .If It Helps.

Re: Row should be bold in SSRS

siddisagar27-Dec-09 23:58

siddisagar

27-Dec-09 23:58

Thx it is working for me

Re: Row should be bold in SSRS

sashidhar28-Dec-09 0:13

sashidhar

28-Dec-09 0:13

Its Ok Any Time..! Thumbs Up | :thumbsup:

But Dont forget to mark it as answer if it helps u.! $Shucks | :-\$

LatestArticle :Log4Net
Why Do Some People Forget To Mark as Answer .If It Helps.

How to check cookies are enable or disable in borwser

Samarjeet Singh@india27-Dec-09 20:12

Samarjeet Singh@india

27-Dec-09 20:12

Hi all,
If the client borwser is cookies disable then i want to show a message to client plz enable ur cookies.......
for this i am writing this code but it is not working

<script language="javascript" type="text/javascript">

function detect()
{
if(navigator.cookieEnabled)

{
alert('Your browser has cookies enabled.');
}
else
{
alert('Your browser has cookies disabled.');
}

}

</script></head>

<body onload="detect();"></body>

Thanks a lot........

Re: How to check cookies are enable or disable in borwser

Abhishek Sur27-Dec-09 20:23

Abhishek Sur

27-Dec-09 20:23

Just store a cookie and try to retrieve it using javascript. If proper value is retrieved, you will find cookie is enabled. Wink | ;)

Abhishek Sur
Don't forget to click "Good Answer" if you like this Solution.
My Latest Articles-->
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Re: How to check cookies are enable or disable in borwser

Samarjeet Singh@india27-Dec-09 20:57

Samarjeet Singh@india

27-Dec-09 20:57

Thnks for Replying ........
I am using IE and also block all cookies but
allways answer is ........"cookies found" by fallowing code

if (!IsPostBack)
{
Response.Cookies["test"].Value = "Samar";
Response.Cookies["test"].Expires = DateTime.Now.AddYears(30);

if (Request.Cookies["test"] == null)
Response .Write ("No cookie found");
else
Response .Write ("cookies found");

}
if I used gmail then message is comming that plz enable ur cookies ?
while according previois code it means cookis is creaing ?

then what is exat answer cookies is enable or disable ?

Re: How to check cookies are enable or disable in borwser

Abhishek Sur27-Dec-09 21:32

Abhishek Sur

27-Dec-09 21:32

Did you try redirecting the page, and find cookies from another page ?

Say in your page1 you place :
Response.Cookies["test"] = "Samar";

In page2 you try to retrieve it using :
if(Request.Cookies["test"] == null)
Response.Write("No cookie found");

During the login process, Gmail actually redirects to more than one page before going to actual Gmail Console. So it is easier to them to understand if cookie is actually enabled or not.

I think if you do like this in your login process, you can easily detect this. Smile | :)

Abhishek Sur
Don't forget to click "Good Answer" if you like this Solution.
My Latest Articles-->
Windows7 API Code Pack

Simplify Code Using NDepend
Basics of Bing Search API using .NET

Re: How to check cookies are enable or disable in borwser

Samarjeet Singh@india27-Dec-09 22:02

Samarjeet Singh@india

27-Dec-09 22:02

Yes ..........Dear I have done according to you

in first page button clic event I M writng this .....

Response.Cookies["test"].Value = "Samar";
Response.Redirect("Default2.aspx");

and second page form load event

if (Request.Cookies["test"] == null)
Response.Write("No cookie found");
else
Response.Write("cookie found");

I have disabled the cookie but it is still showing "Cookies found"

Note-- I M using IE.

Re: How to check cookies are enable or disable in borwser

Abhishek Sur27-Dec-09 22:11

Abhishek Sur

27-Dec-09 22:11

I think this means cookie is not disabled properly in your browser. If the cookie could be read, then browser didnt prevent it to store cookie properly.

Also try in other browser and try publishing the application in IIS.
D'Oh! | :doh:

Abhishek Sur
Don't forget to click "Good Answer" if you like this Solution.
My Latest Articles-->
Windows7 API Code Pack

Simplify Code Using NDepend
Basics of Bing Search API using .NET

Re: How to check cookies are enable or disable in borwser

Samarjeet Singh@india27-Dec-09 22:35

Samarjeet Singh@india

27-Dec-09 22:35

Yes it is Working in Mozilla but not in IE6
How can we check it IE6.........Thnks.......

Re: How to check cookies are enable or disable in borwser

geeeeeeeetha27-Dec-09 23:34

geeeeeeeetha

27-Dec-09 23:34

try this one

Request.Browser.Cookies

Re: How to check cookies are enable or disable in borwser

Samarjeet Singh@india28-Dec-09 1:04

Samarjeet Singh@india

28-Dec-09 1:04

I thing it is for ur borwser supports cookies or not but not for cookies enable or disable

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