save user profile image to database
How can I dynamically insert images when user uploads an image f开发者_如何学Cile to SQL Server 2005 with C# in ASP.NET? This is to let users upload their profile photos in my web app. Is it very different from how it is done for windows app with C#?
There is a metric ton of examples on the web on this one:
http://aspalliance.com/138
https://web.archive.org/web/20210304133428/https://www.4guysfromrolla.com/articles/120606-1.aspx
http://www.aspfree.com/c/a/ASP.NET/Uploading-Images-to-a-Database--C---Part-I/
You should be able to follow any of those to accomplish what you want.
The same way as in in WinForms. Get byte[] and same to image column. But i strongly recommend to use file system to store pictures. DB is for relational data, File System for raw bytes.
http://msdn.microsoft.com/en-us/library/aa479405.aspx
Here is a sample of the code behind for inserting an image into a database in C#. You will of coarse need supporting table the picture should be a byte field and keep the picture type so you can retrieve the image later to display it. In addition to that you need to put a file input box on your page along with a submit button.
public void AddImage(object sender, EventArgs e)
{
int intImageSize;
String strImageType;
Stream ImageStream;
FileStream fs = File.OpenRead(Request.PhysicalApplicationPath + "/Images/default_image.png");
Byte[] ImageContent;
if (PersonImage.PostedFile.ContentLength > 0)
{
intImageSize = PersonImage.PostedFile.ContentLength;
strImageType = PersonImage.PostedFile.ContentType;
ImageStream = PersonImage.PostedFile.InputStream;
ImageContent = new Byte[intImageSize];
int intStatus;
intStatus = ImageStream.Read(ImageContent, 0, intImageSize);
}
else
{
strImageType = "image/x-png";
ImageContent = new Byte[fs.Length];
fs.Read(ImageContent, 0, ImageContent.Length);
}
SqlConnection objConn = new SqlConnection(ConfigurationManager.AppSettings["conn"]);
SqlCommand objCmd;
string strCmd;
strCmd = "INSERT INTO ImageTest (Picture, PictureType) VALUES (@Picture, @PictureType)";
objCmd = new SqlCommand(strCmd, objConn);
SqlParameter prmPersonImage = new SqlParameter("@Picture", SqlDbType.Image);
prmPersonImage.Value = ImageContent;
objCmd.Parameters.Add(prmPersonImage);
objCmd.Parameters.AddWithValue("@PictureType", strImageType);
lblMessage.Visible = true;
try
{
objConn.Open();
objCmd.ExecuteNonQuery();
objConn.Close();
lblMessage.Text = "ImageAdded!";
}
catch
{
lblMessage.Text = "Error occured the image has not been added to the database!";
}
}
加载中,请稍侯......
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