varbinarymax

How to Store and Retrieve a varbinary(max) Column in SQL Server

由 梦想的初衷 提交于 2020-04-11 06:21:28
问题 I am developing an application in which I want to store the user's fingerprint into the database and then compare it with the one taken from the device. I've been having certain issues while converting a varbinary(max) column back to a byte[]. I have tried to use the GetSqlBinary function but it gives me indexoutofrangeException . I am using the code below for storing the template into the database but found that the value is the same for all users. (e.g. 0x000000) public int insernewVoter

PHP sqlsrv library handling of varbinary data limits

由 可紊 提交于 2019-12-24 08:20:47
问题 I have a varbinary(8000) database field in SQL Server that I want to pull out. The sqlsrv limit for varbinary data is 8000. However if I do a select on the data <?php $query = " SELECT myvarbinary FROM table WHERE id = 48033; "; $results = sqlsrv_query($this->conn, $query); return sqlsrv_fetch_array($results, SQLSRV_FETCH_NUMERIC); Then the sqlsrv_fetch_array gives an error: PHP Fatal error: Invalid sql_display_size Truncation solution (works but no use) If I convert the field to varbinary

SQL Server 2008 R2 Varbinary Max Size

由 时光总嘲笑我的痴心妄想 提交于 2019-12-19 00:48:28
问题 What is the max size of a file that I can insert using varbinary(max) in SQL Server 2008 R2? I tried to change the max value in the column to more than 8,000 bytes but it won't let me, so I'm guessing the max is 8,000 bytes, but from this article on MSDN, it says that the max storage size is 2^31-1 bytes: varbinary [ ( n | max ) ] Variable-length binary data. n can be a value from 1 through 8,000. max indicates that the maximum storage size is 2^31-1 bytes. The storage size is the actual

Implicit conversion from data type nvarchar to varbinary(max) is not allowed

由 杀马特。学长 韩版系。学妹 提交于 2019-12-12 10:29:29
问题 I get this exception when I try to insert a DBNull.Value into a nullable varbinary(max) field: Implicit conversion from data type nvarchar to varbinary(max) is not allowed. Use the CONVERT function to run this query. Thats my code: insertCMD.Parameters.AddWithValue("@ErrorScreenshot", SqlDbType.VarBinary).Value = DBNull.Value; I know there exist duplicate questions on SO, but I do NOT use any String like the others do. What do I wrong? UPDATE: using (var insertCMD = new SqlCommand("INSERT

C# : Saving an Image into DB

由 房东的猫 提交于 2019-12-08 09:08:43
问题 Can someone give me some advice on how to save an image file into DB in C#? I will be saving a lot of images so what's the best way to reduce the space it will be needing? I'm currently using varbinary(max) field in DB. Thanks! 回答1: If you MUST store the actual file in SQL then make sure you put some restrictions around the size of the image and make sure you properly plan the database sizing - how many images and of what size are you expecting? If you must store it in SQL my preferences is

Retrieving binary data [varbinary(max)] from SQL Server 2008 using JSP

由 大憨熊 提交于 2019-12-08 05:16:13
问题 Here is the query I am using to create and insert binary data in SQL Server 2008 Create query: CREATE TABLE Employees ( Id int, Photo varbinary(max) not null, Name varchar(50) not null, Sound varbinary(max) not null ) Insert query: INSERT INTO Employees SELECT '10', (SELECT BulkColumn AS E FROM OPENROWSET ( BULK 'd:\1.jpg', Single_Blob) bc), 'John', (SELECT BulkColumn AS E FROM OPENROWSET ( BULK 'd:\2.wav', Single_Blob) bc) One of the files is .jpg and the other is .wav How can i know the

unable to update profile picture using varbinary

由 旧巷老猫 提交于 2019-12-04 05:03:44
问题 I'm trying to update my profile picture using varbinary (SQL Server 2008). It don't seem to update the picture that I put in the fileupload. Below is the code I use to update my profile picture. Do help me take a look on which part of my coding did I do wrongly. Thanks. protected void btnUpload_Click(object sender, EventArgs e) { String username = (String)Session["username"]; string filePath = FileUpload1.PostedFile.FileName; string filename = Path.GetFileName(filePath); string ext = Path

unable to update profile picture using varbinary

由 狂风中的少年 提交于 2019-12-02 08:18:52
I'm trying to update my profile picture using varbinary (SQL Server 2008). It don't seem to update the picture that I put in the fileupload. Below is the code I use to update my profile picture. Do help me take a look on which part of my coding did I do wrongly. Thanks. protected void btnUpload_Click(object sender, EventArgs e) { String username = (String)Session["username"]; string filePath = FileUpload1.PostedFile.FileName; string filename = Path.GetFileName(filePath); string ext = Path.GetExtension(filename); string contenttype = String.Empty; switch (ext) { case ".jpg": contenttype =

C# Resize jpg image, convert to byte and save into database using varbinary

由 半城伤御伤魂 提交于 2019-11-30 22:31:01
I'm trying to resize my jpg image uploaded by using FileUpload control and convert it into byte before saving it to database (SQL Server 2008) as (varbinary(MAX)). What I have done and code show below was that I manage to convert it into byte and save into database as varbinary(MAX). I wish to know how to I resize the image before doing all those function. Do help me out. Thanks! Read the file string filePath = FileUpload1.PostedFile.FileName; string filename = Path.GetFileName(filePath); string ext = Path.GetExtension(filename); Set the contenttype based on File Extension string contenttype =

SQL Server 2008 R2 Varbinary Max Size

由 Deadly 提交于 2019-11-30 20:35:33
What is the max size of a file that I can insert using varbinary(max) in SQL Server 2008 R2? I tried to change the max value in the column to more than 8,000 bytes but it won't let me, so I'm guessing the max is 8,000 bytes, but from this article on MSDN , it says that the max storage size is 2^31-1 bytes: varbinary [ ( n | max ) ] Variable-length binary data. n can be a value from 1 through 8,000. max indicates that the maximum storage size is 2^31-1 bytes. The storage size is the actual length of the data entered + 2 bytes. The data that is entered can be 0 bytes in length. The ANSI SQL
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