Re: Restricting GridView.ImageField size for image display - ASP.NET Discussion Boards

Re: Restricting GridView.ImageField size for image display

Mike Ellison12-Aug-09 2:28

Mike Ellison

12-Aug-09 2:28

Have you considered storing and using a thumbnail of the image?

www.MishaInTheCloud.com

Re: Restricting GridView.ImageField size for image display

Chesnokov Yuriy12-Aug-09 3:02

Chesnokov Yuriy

12-Aug-09 3:02

I can store the thumbnail of the image in addition.

But GridView.ImageField accepts only ImageUrl as a bound control. How can I pass to it say jpeg thumbnail saved in db?

I tried to bound to its url original jpeg stored in db, but it got the error while I called DataBind().

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Re: Restricting GridView.ImageField size for image display

Mike Ellison12-Aug-09 14:50

Mike Ellison

12-Aug-09 14:50

In your context, you'll probably need a custom HttpHandler or .aspx page that will stream the image from the database. Your gridView binds an <img> tag then to a url that points to the handler/page.

This example streams the image from the database with an ASP.NET page.
http://www.beansoftware.com/ASP.NET-Tutorials/Images-Database.aspx[^]

And here are a couple of examples using a handler:
http://www.c-sharpcorner.com/UploadFile/desaijm/HTTPHandlersForImages11152005062705AM/HTTPHandlersForImages.aspx[^]
http://weblogs.asp.net/cazzu/archive/2003/08/27/25568.aspx[^]

I hope this is helpful.

www.MishaInTheCloud.com

Re: Restricting GridView.ImageField size for image display

Abhijit Jana12-Aug-09 4:19

Abhijit Jana

12-Aug-09 4:19

You have set width and height of ImageFiled.
Displaying Image in Gridview from Database[^]

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Web Site : abhijitjana.net
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Re: Restricting GridView.ImageField size for image display

Chesnokov Yuriy12-Aug-09 19:43

Chesnokov Yuriy

12-Aug-09 19:43

I setup Control style to certain width and height and it worked.
Can we set individual rows ImageField sizes so that they display images proportionally, not stretched to fixed NxM predefined size?

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Re: Restricting GridView.ImageField size for image display

Abhijit Jana13-Aug-09 1:06

Abhijit Jana

13-Aug-09 1:06

Chesnokov Yuriy wrote:
Can we set individual rows ImageField sizes so that they display images proportionally, not stretched to fixed NxM predefined size?

You means each and every image field should have different size and Image size will be the same of image field ?

Abhijit Jana | Codeproject MVP
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Re: Restricting GridView.ImageField size for image display

Chesnokov Yuriy13-Aug-09 3:22

Chesnokov Yuriy

13-Aug-09 3:22

No, I meant images of different sizes and width/height ratios would be shrinked to ImageField fixed size retaining aspect ratio.

As currently all images resized without preservation of aspect ratio, just interpolated to NxM.

Чесноков

Re: Restricting GridView.ImageField size for image display

galvin verghese11-Nov-11 23:38

galvin verghese

11-Nov-11 23:38

See this is my code:
I hope it will work fine.

<asp:gridview runat="server" id="gvImages" autogeneratecolumns="false" datasourceid="sqldataImages" cssclass="Gridview" headerstyle-backcolor="#61A6F8">
<columns>
<asp:boundfield datafield="ID" headertext="ID">
<asp:boundfield datafield="ImageName" headertext="Image Name">
<asp:imagefield headertext="Image" dataimageurlfield="ImagePath" controlstyle-width="20" controlstyle-height="20">
<HeaderStyle Width="50px" />
<itemstyle height="50px" width="50px">

Data Table

KhandelwalA12-Aug-09 0:48

KhandelwalA

12-Aug-09 0:48

How to update data table dynamically.......which is data source of a datalist......guide me a bit Smile | :)

Re: Data Table

Mike Ellison12-Aug-09 2:26

Mike Ellison

12-Aug-09 2:26

What have you tried so far?

www.MishaInTheCloud.com

Re: Data Table

Abhishek Sur12-Aug-09 2:45

Abhishek Sur

12-Aug-09 2:45

Just create a new DataTable, set it to DataSource and Call DataBind() Rose | [Rose]

Abhishek Sur

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!postback

Ramkumar_S12-Aug-09 0:45

Ramkumar_S

12-Aug-09 0:45

Hi

i am using placeholder in my page and with the help of usercontrol i am binding the control in the placeholder..

My issue is

I am using dropdown in one of my control ..and its onchange i am calling one function ...but in my control

if(!ispostback) is not working ... and I could not get the dropdown selected value

Plz help

Ramkumar

Re: !postback

padmanabhan N12-Aug-09 0:47

padmanabhan N

12-Aug-09 0:47

please send the code upto which you have tried...

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Re: !postback

Ramkumar_S12-Aug-09 1:19

Ramkumar_S

12-Aug-09 1:19

thanks for your reply

Let to explain in simple manner

when i use usercontrol in placeholder......
Event is not firing for the first time only second time it is firing (usercontrol)

Ramkumar

Re: !postback

Venkatesh Mookkan12-Aug-09 16:24

Venkatesh Mookkan

12-Aug-09 16:24

getramonweb wrote:
I am using dropdown in one of my control ..and its onchange i am calling one function ...but in my control

if(!ispostback) is not working ... and I could not get the dropdown selected value

Are you creating/loading your DropDownList control dynamically. Whenever the postback is happening your DropDownList is re-initialized. Move your creating/loading of the DropDownList into !IsPostback check.

If you could post the code used in the UserControl, it would be easier for answering.

Castle Rider

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Re: !postback

Ramkumar_S13-Aug-09 1:50

Ramkumar_S

13-Aug-09 1:50

Thanks for ur time..

this is the usercontrol which is placed in the placeholder ...

my issue is (!postback) is not working in user control...

namespace IndiaInfoline.Markets.Derivatives
{
public partial class NiftySummary_Inner : System.Web.UI.UserControl
{
DerivativeDAL DerObj = new DerivativeDAL();
DataSet DS = new DataSet();
public string InsSymbol, InstName, Symbol;
static int flag = 0;

protected void Page_Load(object sender, EventArgs e)
{

//if (flag == 0)
//{
// Fillselection(DropDownSymbol.SelectedValue);
// flag = 1;
//}

// Fillselection(DropDownSymbol.SelectedValue);
}
protected void Page_init(object sender, EventArgs e)
{
Fillselection(DropDownSymbol.SelectedValue);
}
protected void DropDownSymbol_SelectedIndexChanged1(object sender, EventArgs e)
{

Fillselection(DropDownSymbol.SelectedValue);
}

public void Fillselection(string ddlselectedval)
{

InsSymbol = ddlselectedval;
string[] strParts = InsSymbol.Split(new char[] { '|' });
InstName = strParts[0];
if (InstName == null)
InstName = "";
if (strParts.Length > 1)
Symbol = strParts[1];
else
Symbol = "";

DS = DerObj.Deriv_GainLoseHiLo(InstName, Symbol, "", "MW");
if (DS.Tables[0].Rows.Count > 0)
{
SummGrid.DataSource = DS;
SummGrid.DataBind();
NoDataFound.Visible = false;
}
else
{
NoDataFound.Visible = true;
}

}

}
}

Ramkumar

Re: !postback

Venkatesh Mookkan13-Aug-09 3:59

Venkatesh Mookkan

13-Aug-09 3:59

getramonweb wrote:
protected void Page_init(object sender, EventArgs e)
{
Fillselection(DropDownSymbol.SelectedValue);
}

Here is the culprit. All postback actions will go thru the complete Page Life cycle. Change your code to following.

protected void Page_init(object sender, EventArgs e)
{
   if (!Page.IsPostback)
      Fillselection(DropDownSymbol.SelectedValue);
}

I hope, this would solve your problem.

Mark it as "Good Answer" if it is helpful.

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Updatepanel trigger automatically

kavinnagarajan12-Aug-09 0:33

kavinnagarajan

12-Aug-09 0:33

How to trigger updatepanel automatically? when seconds(System time) is changed

Re: Updatepanel trigger automatically

Abhijit Jana12-Aug-09 0:44

Abhijit Jana

12-Aug-09 0:44

kavinnagarajan wrote:
How to trigger updatepanel automatically? when seconds(System time) is changed

Yes, You can do it easily using AJAX Timer.

Have a look: Reference[^]

Abhijit Jana | Codeproject MVP
Web Site : abhijitjana.net
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Re: Updatepanel trigger automatically

Zafar A khan 12-Aug-09 0:56

Zafar A khan

12-Aug-09 0:56

Use Ajax Timer Control.
and trigger Asynchronous callback on timer tick(I-e ) update the panel
Like this

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
                <ContentTemplate>
                <div >
                    <asp:Timer ID="Timer1" runat="server" OnTick="Timer1_Tick">
                    </asp:Timer>
                </div>
                </ContentTemplate>
                <Triggers>
                    <asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" />
                </Triggers>
</asp:UpdatePanel>

Updatepanel trigger automatically

kavinnagarajan12-Aug-09 1:15

kavinnagarajan

12-Aug-09 1:15

Thanks, Working in normal webpage without masterpage.

Its not working in webpage contains masterpage.

Updatepanel trigger automatically

kavinnagarajan12-Aug-09 1:27

kavinnagarajan

12-Aug-09 1:27

<%@ Page Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" Title="Untitled Page" %>

<%@ Register Assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
    Namespace="System.Web.UI" TagPrefix="asp" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    Content Page<br />
    <asp:ScriptManager ID="ScriptManager1" runat="server">
    </asp:ScriptManager>
    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
        <ContentTemplate>
            <asp:Label ID="Label1" runat="server"></asp:Label>
        </ContentTemplate>
        <Triggers>
            <asp:AsyncPostBackTrigger ControlID="Timer1" EventName="Tick" />
        </Triggers>
    </asp:UpdatePanel>
    <asp:Timer ID="Timer1" runat="server" Interval="1000" OnTick="Timer1_Tick">
    </asp:Timer>

this is my code.
I not working.

I cant able to run when i used masterpage.

Re: Updatepanel trigger automatically

4anusha412-Aug-09 1:50

4anusha4

12-Aug-09 1:50

keep the timer above the update panel and try it once i think it may work

Local IIS website opens as File-System website in VS2008

Dan Kent12-Aug-09 0:20

Dan Kent

12-Aug-09 0:20

I have a solution that includes three Local-IIS websites (among others) created on Vista in Visual Studio 2008 (Team System). Yesterday the OS was upgraded to Windows 7 and the IIS features (including IIS metabase compatibility etc) and development environment re-installed.

When opening the solution in the new environment the website projects are opened as File-System sites rather than Local IIS. I have gone through the permissions on the relevant folders and parent folders comparing them to a machine that is not experiencing the issue.

I have also tried removing the projects and re-adding them specifying Local IIS but they still appear as File System sites - if I open a new instance of VS and open the site from IIS they appear correctly.

Can anyone tell me how to get the projects to open within the solution as IIS sites?

Thanks in advance.

Re: Local IIS website opens as File-System website in VS2008

Goa_1314-Oct-09 12:02

Goa_13

14-Oct-09 12:02

Dan, i have the EXACT same problem.
Migrated to Win7; my projects in the solution do not open as IIS sites.

Were you able to find a fix for this ?

thanks !

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