I get the data of the stored image on database as byte[] array;then I convert it to System.Drawing.Image like the code shown below;
public System.Drawing.Image CreateImage(byte[] bytes)
{
System.IO.MemoryStream memoryStream = new System.IO.MemoryStream(bytes);
[code]...
Not sure if this is the correct section to ask this but this is regarding storing datatype problem.im trying to convert an image file retrieve from a folder and convert it to Byte so that i can save into database
In below function i retrieve and convert the image from a folder to byte
[Code]....
Then i set ImageUrl in PageLoad
[Code]....
My image datatype in database is image
I have multiple nested GridView controls where I have one field/column that always have one of three values only (0, 1, and 2) and this is editable field. Now, instead of putting this field as a DropDownList for the end-user to choose either one of these values (0, 1, or 2), I am representing each value with a specific clickable image, so the user can click the image to switch among the mentioned field states (0, 1, or 2).
I managed to do this with ImageButton and AJAX. However, the volume of this field is too high, the page is quite big, and the end-user needs to do change the state/value of this field most frequently, which causing a flicking issue in the page and slowness (because the code is done by AJAX, so in the server side) where the customer is not accepting it.
how we can rectify this issue; for example using javascript coding (but I need to get the selected value from code-behind)? I found the AJAX Toolkit ToggleButtonExtender which is very good and not causing the flicking/slowness issue, but unfortunately, this ToggleButton has only two states while I need three states option.
I have a working application to save an image file to my sql database (Saves as "Original_Image" in the DB TBL_ImageGallery). I have a file limit on the upload of 1 MB. This also works great and the image is being saved beautifully. I found a bit of an issue. Being i am working on a network with 2 bonded T1 connections the streaming of images to my site, when tested internally, is effortless. I am not sure that this will be the same with a generic bandwidth. I want to store the original image size into the databse (already done) but also store a smaller sized (in bytes not actual size [Width, Height]) to my database in a "ThumbNail" column. This will allow the browser to only have to pass the "Thumbnail" sized image, obviously this needs to be much smaller than the original (ex: 1MB orignal I want to save as 12KB image in the thumbnail column), to the thumbnail img control in the user's interface.
I am not sure if this is possible or if there is a need of third party controls. I am interested in doing this as either a stored procedure or in the C# code on an event fire. There may be a better / other solution to this and if that is the case I am also interested
I am using web services to retrieve one record from database. here in this record there is one image field.In web service, the record is converted to xml document and sent to client
when i send this record to client thru webservice , this photo is converted as byte[].
to check before giving to client, i checked my webservice. for that i took a new .aspx page and i retreived my record in to dataset and binded that to gridview. In gridview, I could see my image in byte[] format
I want to change this byte[] to previous image format in my asp.net page.
I am unable to change. I searched in google, I am unable to solve my problem.
i save picture as image in sql database for user profile
now i have a page that sow user profile information an im this page i have a image control to show user avatar with.
in code behind with Userprofile.Avatar code i got the image as byte
how can i bind the image with this code?
How can I save image in db as byte array and show the saved image as slide show in my web page with C# asp.net 3.5
View 1 RepliesIs there a control that you can use? It can be done by fetching a binaryread from an aspx page but why there isn't a simple free image control that you can put in the page and feed it a byte array?
View 15 Repliesi got an image display in my system, note that it is not an uploaded file, it is display in <asp:Image> form
My question is, how do i use that image and convert it to a byte data so that i can save into database?
I am develping an application that integrates with an RFID kit. The problem is, the kit comes with an .cs class that accepts data stored in a byte array however, each information stored in the array respresents an int. I wanted to store String information in each array but, my research suggest that a String itself can be converted to a byte array and not a byte....here the code from the .cs class:
byte BlockNo = 0;
byte[] BlockData = new byte[16];
byte ReturnCode = 0;
[code]....
Each t_b*.text respresents an int. Is there a way I can stored a String in a single byte block?
Is it better to store the image into sql server as a byte array or store the image's location to sql server and the image to the server?
View 2 Repliesi am not getting the output. I can able to display the image using generic handler.What i need is to display without using generic handler.
View 1 RepliesI have implemented the following functionality that connects to webservice and downloads a favicon from a given site and saves it to a byte[] which I store in our database. I now want to set it up so that it saves the icon to the disk. However I am getting a "Parameter is not valid" when I try and create the image from the byte[].My code is as follows..
stream.Write(imageByteArray, 0, imageByteArray.Length);
Image i = Image.FromStream(stream); // EXCEPTION HAPPENS HERE.
i.Save(@"C: mp" + filename + ".ico");
The exception occurs on the middle line. This code works perfectly 9 times out of ten, but for some favicons, even thought the icon is a valid image (or at least it appears to be and it shows in the browser when point at it) I get this exception. Does anyone have any ideas? I am pulling my hair out here!
if (Session["image"] != null)
{
ImageButton1.ImageUrl = "~/IMAGE/pic.jpg?" + DateTime.Now.Ticks.ToString();
}
The session key image is from another aspx page
{
string strPhoto = Request.Form["imageData"]; //Get the image from flash file
byte[] photo = Convert.FromBase64String(strPhoto);
FileStream fs = new FileStream(Server.MapPath("~/IMAGE/pic.jpg"), FileMode.OpenOrCreate,
[Code]....
The issue is
Operand type clash: nvarchar is incompatible with image.
ArrayList lstEndPoints
0 element "0x01"
1 element "0x82"
byte b = (byte)(lstEndPoints[0]); //Error cannot convert
[URL]
i am failing to get the Base64 string and show it as an image in the output pdf file.
I have a signautre canvas that saves the output directly into the sql database.
How can i view a PowerPoint Presentation on ASP.NET Page. If my PPT file is in the "PPTFILES" folder on my website root.
View 1 RepliesI have a solution which has the following structure:
Solution
-Business Entity(project)
-Business Rules(project)
-DataAccess(project)
-Presentation(project)
-ClientBin
-Images
-Login(contains aspx pages, mastpage)
etc
Everything works absolutly fine in dev, but when I move the solution to IIS 7, I get this error! CompanyWeb is the masterpage, which is located in the login directory. Here is the page directive for login.aspx, which is the offending page
<%
@
Page
Title=""
Language="vb"
AutoEventWireup="false"
MasterPageFile="CompanyWeb.master"
CodeBehind="login.aspx.vb"
Inherits="Presentation.login" %>....................
I got a variable of type System.Drawing.Image and need to convert it to a variable of type byte so I can store the image in the database. Can someone show me how to do that in VB.NET code.
View 2 RepliesI am developing a dynamic site that utilizes webparts, it uses jquery's sortable to perform the drag and drop functionality. Now I am attempting to write a callback that saves the page state when the user drags and drops a webpart from a zone to another. As you can see from the code below, I am attempting to manually call a function which updates the database of the page state.
However I dont know how to get the datablob for the current page, how can I get this object for saving?Is retrieval of the datablob possible via a callback?Is there another/better way to acomplish this? //In my custom class 'CustomWebPartManager' I have the following code
protected override void OnPreRender(EventArgs e)
{
string cbReference = Page.ClientScript.GetCallbackEventReference(this, "arg", "GetDateFromServer", "context");[code]....
how can i optimized this code? i dont like to have case statement, is there a way i can improve this code?
protected void ddlFilterResultBy_SelectedIndexChanged(object sender, EventArgs e)
{tring selVal = ddlFilterResultBy.SelectedValue.ToString().ToLower();
itch (selVal)
{
case "date":
[code]...
At my current place of employment, a university, we are going to take a stab at making a mobile browser-oriented section of our web site. I was wondering if anyone could direct me to some good resources that they know of for such a thing. Primarily, names of books would be nice, but any kind of resource at this point would be extremely helpful. We are approaching this as more of an HTML project at the moment, so the resources don't need to be Asp.Net based, but such things would be great too.
View 4 Repliesis there a way i can optimized this code and make this extensions on web.config settings so i can read from there and in future if i need to add or remove i should be able to do easily?
if (fileExt.ToLower() == ".rtf" ||
fileExt.ToLower() == ".xls" ||
fileExt.ToLower() == ".doc" ||
fileExt.ToLower() == ".png" ||
The code was executing fine but now an exception is generated: "exc = {Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack.}"
[code].....
If I have a huge Order-table and I want to display records from it using paging, what is the best way to select the records from the database?
If I first do like this:
[Code]....
..and then select the records I want based on RowNum it seems like I select ALL records in the first query anyway. I guess I want to do something like SELECT TOP @PageSize FROM Orders...