AJAX :: How To Read Binary Image With Update Panel
Apr 15, 2010
I have a page that have
[Code]....
[Code]....
And The ImageViewer Page Have
[Code]....
when i click the button for the first time it worked and the debugger go to the load of the Image Viewer page ,and when
i click the button again, it does not go to the image viewer page load at all (some kind of cache),of course if i remove the update
panel it will work perfectly, but i need it with update panel , the above code is a smplified test version of what i trying to do,
i need to read binary image with update panel(orginally i dont have a physical image, only binary)
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Jun 21, 2010
I have a formview in Edit Mode, within an update Panel all and these arewithin a Modal Pop Up extender.On clicking Formview Update button, I want an image to appear within the pop up.I have put the image within another panel1 and runat server.For some reason the image is not showing on clicking update button.
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Nov 29, 2012
I am developing an application in which i have to store image in database SQL server2008. I want to use upload file control and only want to upload .jpg and JPEG file and view this image in image control . And when i want to update this record i can update that image too..
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Jul 14, 2010
I am using Ajax to update my UpdatePanel every 1 second and it is working perfectly with my gridview. However, when I placed a image into the UpdatePanel, which it supposed be changing and updated every 1 second, it does not update but the gridview does. Gridview is getting active changing data from the database without any problem. The image which I want to see the updating is the StreamImage.jpg. StreamImage.jpg is inside my local directory. It only updates when I hit the refresh button.
<asp:Content ID="Content4" ContentPlaceHolderID="ContentPlaceHolder2" Runat="Server">
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Mar 11, 2010
I want to read from database where I've stored a image in binary field and display a image.
while (reader.Read())
{
byte[] imgarr = (byte[])reader["file"];
Stream s = new MemoryStream(imgarr);
System.Drawing.Image image = System.Drawing.Image.FromStream(s);
Graphics g = Graphics.FromImage(image);
g.DrawImage(image, new Point(400, 10));
image.Save(Response.OutputStream, ImageFormat.Jpeg);
g.Dispose();
image.Dispose();
}
con.Close();
This piece of code doesn't work:
System.Drawing.Image image = System.Drawing.Image.FromStream(s);
I tried the code from this article. And I got the same mistake " the parameter is not valid ". Maybe I'm not aware of something, some setting in sql server or webconfig or sth else. Anyone else who has experience from fetching images from database? The parameter is not valid is the error message. db table contains data. What am I doing wrong?
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Oct 28, 2010
I've got a working update panel which works fine when updating a label control, but I can't get it to work with an updated image (initial image loads fine - the problem is with the update). I think the problem maybe that the image name and location don't change, only the physical file. In other words, I've loaded the page, then updated the image (same name and location), but the image does not update with the label? Here's my code:
[Code]....
And the code behind:
[Code]....
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Jun 24, 2010
when i m going to store img in db and using fileupload control it's not possible to store , but if i remove update panel and scr... manager i can. need soluation. i m storing img as image in db as filebyte
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Jul 20, 2010
I'm having a problem where users with a slow connection aren't getting my image feed properly.i'm sending them new images every second to a picturebox inside an Ajax Update panel, using an Ajax Timer.so if their connection is really slow, one image doesnt load fully before the next one comes in, so they never get the whole picture...And for people with a faster connection, I would like to increase the update rate, and currently I see no way of dynamically setting the update rate.
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May 7, 2015
My combobox and asp:fileupload and imagepreview all are inside update panel , my combobox is doing postback after which my image disappears.... how to retain back image after postback ?
In [URL] .... if I remove input:file and put asp:file then it will be possible ... here's all code:
using System;
using System.Drawing;
using System.IO;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class Default3 : Page
[Code] ....
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Sep 6, 2012
I have 4 Image buttons on my user control and on the click of that Image button, I am opening new pop up window. I had used update panel but still it is refreshing the page. I don't want to refresh my page on the click.
<asp:UpdatePanel ID="SharePanel" runat="server">
<ContentTemplate>
<div class="full">
<h3>Share :
<asp:ImageButton ID="imgFB" runat="server"
ImageUrl="http://localhost:49524/mysite/Images/facebook_ico-1.gif"
[CODE]....
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Nov 24, 2010
I have an update panel with a set of 2 radio buttons, a label and an image button inside of it. There another set of 3 radio buttons that trigger the update panel. I got everything working but now the image button, label and set of 2 radio buttons inside the update panel show up twice when the radio button triggers are selected?
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May 4, 2014
How to display wait image when data is being populate into one drop down based on selection of another dropdown inside update panel....
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Mar 23, 2013
I tried this link to generate verification Image [URL] ..... It works fine.
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<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<tr> <td colspan="2">
<asp:Image ID="imCaptcha" ImageUrl="~/Captcha.ashx" runat="server" />
[Code] .....
Although the image changes but the whole page is refreshed. Whether this is due to incompatibilities httphandler and updatepanel?
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Sep 5, 2010
We have two update panels on our webpage. Now first update panel is having button cancel. While second update panel is having a file upload control.
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Aug 22, 2010
How to Update Binary Image on Formview
[Code]....
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May 30, 2010
I'm having a hard time solving what should (I think) be an easy problem. I have a formview defaulting to Editmode. One of my data fields is a binary image. How can I change the editItem template to allow a user to upload a new image into the binary image field?
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May 7, 2015
along with a gridview update file that I store in my database
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Jun 5, 2010
I have a panel withitn an updatepanel with some buttons.
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If I click the button again , then I see the first update. If I click it again, I see the second update and so on..
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Mar 6, 2013
I have update panel on the page to avoid postback and placed a dropdownlist control within that update panel. DrodownList is filled with Category names and also it's autopostback set to True.
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May 16, 2010
I have one update panel inside updatepanel i have one dropdownlist .When i change dropdownlist value so as per value button1 which is out of updatepanel not visible =true or false as per dropdownlist value.
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Aug 4, 2010
i have my master page with one update panel working like a banner, so when the timer do tick every 5 sec
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Jan 2, 2010
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Aug 30, 2010
I have an AJAX Modal Popup panel that contains a RadioButtonList, 2 labels and 2 DropDowns. I want to update the Labels and DropDowns when a radio button is selected. My attempt at this posts back which causes the ajax popup to disappear.
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<asp:Panel ID="pnlModalContainer" runat="server">
<asp:RadioButtonList ID="rblTest" runat="server" RepeatDirection="Horizontal" OnSelectedIndexChanged="rblTest_SelectedIndexChanged">
[code]...
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Jun 8, 2010
I'm new to the world of Update Panels and i'm having a hard time figuring out how to use them properly.
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