When I am featching binary images from database and displaying in datalist on asp .net image cotrol. The image display getting too much time. When I click on next button also I take too much time for display next image.
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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.
Here is my code:
protected void SaveMyImage_Click(object sender, EventArgs e)
{
string imageUrl = Hidden1.Value;
string saveLocation = Server.MapPath("~/PictureUploads/whatever2.png") ;
[Code]....
The top imageUrl declartion is taking in a Base64 image string, and I want to convert it into an image. I think my set of code only works for images like "www.mysite.com/test.jpg" not for a Base64 string.
I am getting the error: String or binary data would be truncated. The statement has been terminated. when trying to upload an image. What would cause this? my code is:
protected void Button1_Click(object sender, EventArgs e)
{
if (IsPostBack)
{
HandleUploadedFile();
}
string connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
System.Data.SqlClient.SqlConnection sqlConnection1 =
new System.Data.SqlClient.SqlConnection(connectionString);
System.Data.SqlClient.SqlCommand cmd = new System.Data.SqlClient.SqlCommand();
cmd.CommandType = System.Data.CommandType.Text;
cmd.CommandText = "INSERT INTO picstosort (imageurl, useraddy) VALUES (@imageurl, @useraddy)";
cmd.Parameters.AddWithValue("@imageurl", Label5.Text);
cmd.Parameters.AddWithValue("@useraddy", TextBox1.Text);
cmd.Connection = sqlConnection1;
sqlConnection1.Open();
cmd.ExecuteNonQuery();
sqlConnection1.Close();
if (TextBox1.Text != null)
{
string strTo = TextBox1.Text;
string strFrom = "noreply@test.com";
string strSubject = "Picture Uploaded";
SmtpMail.Send(strFrom, strTo, strSubject,
"Thank you for uploading your picture! ");
}
}
private void HandleUploadedFile()
{
string root = Server.MapPath("~/");
if (!root.EndsWith(@""))
root +=@"";
string fileDirectory = root + @"Images";
string link = "<a href='Images/{0}' target='_blank'>{1}</a>{2}{3}";
for (int i = 0; i<Request.Files.Count; i++)
{
HttpPostedFile fi = Request.Files.Get(i);
byte[] fileBytes = new byte [fi.ContentLength];
using (System.IO.Stream stream = fi.InputStream)
{
stream.Read(fileBytes, 0, fi.ContentLength);
}
string fileName = Guid.NewGuid().ToString();
File.WriteAllBytes(fileDirectory + fileName + "_small.jpg",
ResizeImageFile(fileBytes, 10000));
litText.Text += string.Format(link, fileName + "_small.jpg",
fileName + " Small", "<br/>", "<br/>");
Label5.Text = fileDirectory + fileName + ".jpg";
litText.Visible = true;
fileBytes = null;
}}
private static byte[] ResizeImageFile(byte[] imageFile, int targetSize)
{
using (System.Drawing.Image oldImage = System.Drawing.Image.FromStream(new MemoryStream(imageFile)))
{
Size newSize = CalculateDimensions(oldImage.Size, targetSize);
using (Bitmap newImage = new Bitmap(newSize.Width, newSize.Height, PixelFormat.Format24bppRgb))
{
using(Graphics canvas = Graphics.FromImage(newImage))
{
canvas.SmoothingMode = SmoothingMode.AntiAlias;
canvas.InterpolationMode = InterpolationMode.HighQualityBicubic;
canvas.PixelOffsetMode = PixelOffsetMode.HighQuality;
canvas.DrawImage(oldImage,
new Rectangle(new Point(0, 0), newSize));
MemoryStream m = new MemoryStream();
newImage.Save(m, ImageFormat.Jpeg);
return m.GetBuffer();
}}}}
private static Size CalculateDimensions(Size oldSize, int targetSize)
{
Size newSize = new Size();
if (oldSize.Height > oldSize.Width)
{
newSize.Width = (int)(oldSize.Width * ((float)targetSize / (float)oldSize.Height));
newSize.Height = targetSize;
}
else{
newSize.Width = targetSize;
newSize.Height =
(int)(oldSize.Height * ((float)targetSize / (float)oldSize.Width));
}
return newSize;
}
}
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.
Now whenever dropdownlist index change's on select, untill page loads complete data it should show mesage as "Loading.... in center and middle of the page and background should become bit transparent". And when page load completely with data then that background and message should get disappear.
I have a binary code in XML. I want to get image from this binary code. And display in web page. using C#.
View 3 RepliesI have a MS Chart Control and I'm trying to serialize the chart to view state. When teh page postbacks, I wnat to de-serialize the chart from ViewState, then load it back to the Chart's serializer. When the Chart1.Serializer.Load is called, I get an error message stating Data at the root level is invalid, line 1 position 1.
So here's what I have:
Chart1.Serializer.Format = System.Web.UI.DataVisualization.Charting.SerializationFormat.Binary;
Chart1.Serializer.Content = System.Web.UI.DataVisualization.Charting.SerializationContents.All;
Chart1.Serializer.Save(myStream);
ViewState["myStream"] = myStream.ToArray();
On postback, when the routine is called:
System.Byte [] byters;
System.IO.MemoryStream myStream = new System.IO.MemoryStream();
if (ViewState["myStream"] != null)
{
byters = (System.Byte[])ViewState["myStream"];
myStream.Write(byters,0,byters.Length);
myStream.Position = 0;
Chart1.Serializer.Load(myStream); // this line throws a XmlException - data at the root level is invalid. line 1 , position 1.
}
The length of the stream was 15,518 and capacity was 16,384 when it made the save. On postback, both capacity and length became 15,518.
I'm trying to display a string on my content page which is set in the master page but i'm getting the error message: 'compid' is not a member of 'ASP.test_master'
Here's my master page code:
<%@ Master Language="VB" debug="true" %>
<script runat="server">
Dim compid As String = "test" [code]....
And my content page code:
<%@ Page Language="VB" MasterPageFile="test.master" %>
<%@ MasterType virtualpath="~/test.master" %>
<asp:Content ContentPlaceHolderId="CPHLoginButton" runat="server"> [code]...
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?
I have a web page with some textboxes and some buttons on it. There is also a dropdown list. By experimenting I have discovered that the dropdown list, which has several thousand items in it, slows the page down considerably just by being there. I tried the following code in the datasource for the dropdown:
[Code]....
which didn't work. I also tried removing the datasource and populating the dropdown in code in the page load where not ispostback and that didn't work.
I have a form in vb 2010 with multiple image buttons displaying images. My problem is that when I click on a button the page automatically returns to the top of the page(the image is displayed). The me.button.focus() code causes the page to load on top of the displayed image. Is there a way to keep the focus on the button while the image is being diplayed at the same time.
View 2 RepliesI m ina problem and don't know how to fix it: I have six imagebuttons what i want is whenever user will click on any one of it he should be navigated to other page where the same image should be displayed enlarged- Now for that my aspx source code for awards page where all imagebuttons lies is-
[Code]....
Now where should i use querystring to hold imageurl in above code and how can u plz provide me the required code Secondly, on second page i am using aspx image control to show enlarged image How can i use querystring to assign imageurl of previous page image button to it
I tested my app locally and it works perfect, but as soon I publish it, upload it to server and try it, on a 100% copy of my local database it throw me a truncate message; now via this msg
that throws me the error query or via sql profiler I got this query:
[Code]....
I've made a test page, a HTMLEditor in a updatepanel. And a updatepanel with 1 butten and 1 textfield. If i press the button btnTextBox the _click code below is runned:
public partial class test : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnTextBox_Click(object sender, EventArgs e)
{
txtTextbox.Text = "Hellow world!";
}
}
It takes a few seconds bevore the "Hellow world" is in the texteditor. But if i remove the HTML editor, it going very quick! So if i add the ajaxcontroltoolkit in the page it slows down quite easy changes with some seconds.... so you get a very slow working page. How can i speed this up. The test ASPX page:
[Code]....
i need a image control, who is able to convert the binary image data into image automatically, i find one which is paid control by telerik, but i need a freeware of it.
View 3 RepliesI am having weird display issues using the jQuery dialog with an iframe in Firefox and IE8.
I have tested the page itself outside of the iframe and the problems are not reproduced, only when inside of the jQuery dialog.
Issue,image actual size: 300x225 image display size: 400x300
JS Code - Parent Page
$(document).ready(function() {
var img = $('.photoLink');
var imgSrc = img.attr('src'); [code]....
The class of the image is set dynamically based on image dimensions.
The image path is set in the code behind, no styling or resizing done.
The images are resized upon upload to be no larger than 300x300.
Display is correct in Chrome and Safari, but in IE and FF for some reason it enlarges the image.
I am using Sql server version enterprise edition 9 on win NT.I have an issue with the stored procedure, when I execute the SP I get an error message "String or binary data would be truncated." In general I know that we get this error when the inserted value is greater than the column length, but in this scenario the SP is failing only the for the section 1 insertion. The same SP contains one more section where we are inserting records in to same table from same source table based on some different condition and it works.I wrote a script in which I copied the section from the SP which has the problem and storing the output of it in an temp table and inserting one by one record using cursors in to the destination table and then it works.I tried with the option SET ANSI_WARNINGS OFF and SET ANSI_NULLS ON, but it did not work. I am sure that it is not failing because of the length of the data inserted.Is there are other configuration that i can set??
View 1 Replies[Code]....
I am using above mentioned code to insert image in binary format and display
Insertion code is working fine but image cannot be retrieved from DB
(Note: there is no syntex error in Code)
How to Update Binary Image on Formview
[Code]....
If any user gives the information of his photo in binary objects how can i search it and how can i display the corresponding image that was stored in the sql database
View 4 Repliesi want to show binary image in griedview. which is store in database.i was trying but not get this.
View 3 RepliesI want to load an image file (Converted in bytestream) from Database to Piczard Control.How to do perform this operation ??
View 1 RepliesI have been googling this and have not come along a working solution for an entire day. I don't know anything about binary data types (as I've never knowingly used them) and I'm trying to write a binary value that I see in the registry, to the registry. Now, all I see is the following [shown below]... and if I try to pass that as a string to the RegSetValueEx in the WinAPI and of course it errors out... I do not know what 'numbers' I need to pass into the lpData As Any, argument of RegSetValueEx (i tried a bit array) in order for it to come out as the following [shown below] in the regedit. I really have no idea, and my tests to place random numbers in the bit array just produce corresponding random "figures" as visible in regedit that I do not understand how to 'tie' them together logically.
here is the culprit!
[Code]...
If I had the following in a string or a bit array, what must I populate the bitarray with so that the registry outputs this [above] when written? or, how can I figure out how to do it? I was hoping there'd be a function that reads my string of binary data and transforms it into the real binary format to submit to the RegSetValueEx function in VB6 or other function in VB.Net or C# (this really is a language agnostic question, and the problem exists in all languages; ie: same process).
I wish to know how to convert the byte array file to a file in a string format and display it in a webpage. how can i perform this?
View 1 Repliesi want to show a loading gif while page loading. I am opening a popup window from javascript using window.open. I just want to display an image when mozilla or IE progress bar is being shown as gmail does when we login. I know how to show loading img after page is loaded i want it with the progressbar of the browser.
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