Hello Everyone I'm new in programming. I am working on small project in my project
I have
windows form where user will upload 4 to 6 Images and i want to store these images
in SQL Database Table After that i want to retrieve these Images regarding one user.
Now my question is how can i store these images in one SQL column without any new row in Database Table?
Is it right way to store and retrieve Images ?
You store image names in your database, and not images themselves.
Also, store image names of the 4-6 pictures belonging to one customer in one cell and not a column. Try this, hope it works.
If you are going to store images rather than paths in the database use a varbinary field. Once in the database it is easy to use the images in reports (ssrs) of you can extract and use in your application.
There used to be an image datatype but that is being removed. Also consider the size of the image 1MB + and you really should be storing paths.
You will need to import your image and convert to varbinary. Example:
MemoryStream ms = newMemoryStream();
pictureBox1.Image.Save(ms,ImageFormat.Jpeg);
byte[] photo_aray = newbyte[ms.Length];
ms.Position = 0;
ms.Read(photo_aray, 0, photo_aray.Length);
Here is a link to a demonstration that should help: tutorial
Related
I have been trying to create a select-your-picture-and-upload function of a normal user's profile in Delphi 7, but I am running in some problems.
Basically what I want is the following:
User uploads a picture from a folder (which I have achieved through a normal
OpenPictureDialog component)
Said picture gets stored in a database, which is where I'm stuck.
The database is a normal access database.
The table has a unique ID to identify the members and next to that is the picture of each member on the "Picture field" (which is set as a BLOB object).
So in other words my question is the following:
What components do I need to use in order to save a picture to a specified place in my database?
I have found some random code in the net but I'm running into troubles understanding what it does.
ADOQuery.SQL.Text := 'SELECT PictureField FROM YourTable';
ADOQuery.Open();
ADOQuery.Edit();
TBlobField(ADOQuery.FieldByName('PictureField')).LoadFromFile('PathToPictureFile');
ADOQuery.Post();
You can use imageEn component.
Web Site url to get information and download trial
I have an Access database containing information about multiple clients.
I can put these datas into one table (1 row = 1 client).
I want to create vsd files from this table. I want to draw a Template and associate forms with fields.
I'm new in Visio, but I succeed in mapping a table to a draw, but I don't know how to ask Visio to generate a file per row. I'll appreciate any help.
I don't think it's possible, so I wrote a PowerShell script to do the job.
For each row, it open and edit the Template and save it Under a new name.
How to form database with users and images and to know every user which images belongs to him. For example if I have in database users with (id=1 name=Peter) and another user (id=2 name=Alex) and etc. ? How to know with FK and PK which images belongs to him, how to form this database ?
I suggest to store the location of the images in the database using VARCHAR datatype instead of any BLOB or other binary datatype.So you can use a column for ImageUrl Or path no need to use different table.
Storing the database location reduces the size of database greatly as well updating or replacing the image are much simpler as it is just an file operation instead of massive update/insert/delete in database.
Note:Before saving Image to actual folder don't forget to rename it Because uploaded image can have same name try to use GUID as it Gives unique value.
http://blog.sqlauthority.com/2007/12/13/sql-server-do-not-store-images-in-database-store-location-of-images-url/
My job requires that I look up information on a long spreadsheet that's updated and sent to me once or twice a week. Sometimes the newest spreadsheet leaves off information that was in the last spreadsheet causing me to have to look through several different spreadsheets to find the info I need. I recently discovered that I could convert the spreadsheet to a CSV file and then upload it to a database table. With a few lines of script all I have to do is type in what I'm looking for and Voila! Now I just got the newest spreadsheet and I'm wondering if I can just Import it on top of the old one. There is a unique number for each row that I have set to primary in the database. If I try to import it on top of the current info will it just skip the rows where the primary would be duplicated or would it just mess up my database?
Thought I'd ask the experts before I tried it. Thanks for your input!
Details:
the spreadsheet consists of clients of ours. Each row contains the client's name, a unique id number, their address and contact info. I can set the row containing the unique ID to primary, then upload it. My concern is that there is nothing to signify a new row in a csv file (i think). when I upload it it it gives me the option to skip duplicates but will it skip the entire row or just that cell causing my data to be placed in the wrong rows.. It's apache server IDK what versions of mysql. I'm using 000webhost for this.
Higgs,
This issue in database/ETL terminology is called deduplication strategy.
There is not a template answer for this, but I suggest these helpful readings:
Academic paper - Joint Deduplication of Multiple Record Types
in Relational Data
Deduplication article
Some open source tools:
Duke tool
Data cleaner
there's a little checkbox when you click on import near the bottom that says 'ignore duplicates' or something like that. simpler than i thought.
I have done an MS SQL Query in excel.
I have added extra colums in the excel sheet which I want to enter manual
data in.
When I refresh the data, these manually inputted columns become misaligned
to the imported data they refer to.
Is there any around this happening.
I have tried to link the imported data sheet to a manual data sheet via
vlookup but this isn't working as there are no unique fields to link together.
Please help!
Thanks
Excel version is 2010.
MS SQL version is 2005.
There is no unique data.
Because excel firstly looks like this.
when we entered a new order in to database Excel looks like this
Try this: in the External Data Range Properties, select "Insert entire rows for new data".
Not sure, but worth a try. And keep us updated of the result !
edit: And make sure you provide a consistent sort order.
There is no relationship to the spreadsheets external data and the columns you are entering. When refreshing typically the data is cleared and updated though there are other options in the external data refresh menu you could play with. You could play around with the External data options in the menu to see if changing the settings on what happens with the new data would help.
If you want your manually entered data to link to the data in the embedded dataset, you have to establish the lookup with a vlookup or some formula to find the rows info and show it.
Basically you are thinking the SQL data on the spreadsheet is static, but it isn't unless you never refresh it or disconnect it from the database
note that Marcel Beug has given a full solution to this problem in a more recent post in this forum # Inserting text manually in a custom column and should be visible on refresh of the report
he has even taken the time to record an example in a video # https://www.youtube.com/watch?v=duNYHfvP_8U&feature=youtu.be