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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.
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;
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Each t_b*.text respresents an int. Is there a way I can stored a String in a single byte block?
I'm retrieving a binary file from the database, a .pdf file that I would like to let the user open and view. From what I can tell, there are two steps to do this:
1. Convert binary file to byte array
2. Convert byte array to file content
Here's what I've got so far:
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This isn't working and I'm having a heck of a time trying to find a solution. I'm getting a blue squiggly under c1.docData in the Dim bArray line.
Need to display download link with file size as(369KB, 1MB) for file's saved in database for images,pdf, doc, docx, xlsx.
How to calculate file size for any format of file saved in database..?
i need the to convert the byte array in to string. The byte array is a two dimentional array. Is it possible to convert?
View 3 RepliesI am trying to upload a file to the database using the File Upload control. The database column is of type "text"
In the Insert command, I tried to retrieve the file and pass, but as it is a byte array, I am not able to save the data.
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How to convert the byte array to string?
Is 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 RepliesIs 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 Repliesif (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,
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The issue is
Operand type clash: nvarchar is incompatible with image.
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 RepliesWhen 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.
View 1 RepliesNot 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
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Then i set ImageUrl in PageLoad
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My image datatype in database is image
I want when user upload a doc file it convert into pdf. How can i do this. I read that itextsharp convert it.
View 1 RepliesHow can i add new page in pdf using bellow article.
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how to encrypt a PIN in to 4 byte binary. The MD5 and other hashes I have known give the result as 8 or 16 byte. I need only 4 bytes because it is alloted only varchar(4) in the database.
View 3 RepliesI need a query which converts base64 to normal string . I am storing my value as base64 in the DB . How can I convert it to normal text from query
View 7 RepliesI have a scanned pdf document which contains an image and some lines of text after the image what i need to do is to take the image part and convert it in jpeg without the text part,how can i do that in an application in .net,first of all is that possible that from scanned document containg text and image i can only extract image and then convert it into jpeg
View 1 Repliesi refer u r code but it given m error as The document has no pages.
View 1 RepliesI 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;
}
}
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I want update pdf to databse without using any controls(file upload)
i will convert the webpage to pdf when i click convert i also automatically saved to database how????
I m doing a project to export the data from Gridview to PDF. Everything was fine and a new pdf document has been opened whenever I click the PDF image but there was no records displayed in it.
I have 15 records in Gridview and those records have displayed using Table Adapter. I used the Sand and Sky Auto Formatting option in Gridview and color, tablecell width, 15 rows are displayed perfectly in PDF without the text. what am I missing.
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
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I am running into a problem with the btnPdf.on pdfDoc.Close it gives me an IOException was unhandled by user code.. The detail is The document has no pages.. I have a populated grid.. The only changes I made were to change the filename to filename LotGrid.pdf and the grid name to the name of my gridview..
View 1 RepliesI am trying to get the following code behind to store a file in a datbase using Linq (with *dbml). I am getting an intellisense error in my "For each" loop the says the following":Value of 'Byte' cannot be converted to 'System.Data.Linq.Binary'I have been searching for awhile, but I can't seem to find a solution that has worked for me yet.
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I know that I could use HttpServerUtility.UrlTokenDecode Method to do the job. But the problem is that I am using .NET 1.1 and this method is only supported in .NET 2.0+. Also I found that Convert.ToBase64String method is not an option because of the differences addressed here. So what other options do I have? Do I have to write my own converting method?
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