Reading Database Question..
Mar 15, 2008
Hello all!
I am currently building a website and have reached a brickwall called SQL..
I hope this is ok to post on this forum I wasn't sure if I had come to the right place!
Basically I have an SQL database on my server and I would like to have my website access it and update information on a page i.e. :
Item Name: Quantity Sold: Price:
T-shirt 50 $10
Jeans 25 £20
How easy is such a thing to do as I have a very limited knowledge of SQL and especially incorporating it into web code..
Thanks!
jake
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Jun 29, 2005
I have this code that I hacked together from someone else's example. I kind of understand how it works. I just don't know if it will and i am not in a location right now to check. I was wondering if I did this correctly first, second how can it improve and should i do something different. Basically i just want to check the password in a database. I am passing the username and password to this function from another functioprivate bool authUser(string UserName, string Password){ string connectionString = ConfigurationSettings.AppSettings["DBConnectionString"]; SqlConnection DBConnection = new SqlConnection(connectionString); bool result = false; DBConnection.open() SqlCommand checkCommand = new SqlCommand("SELECT password FROM Users WHERE userName='" + Password + "', DBConnection) SqlDataReader checkDataReader = checkCommand.ExecuteReader();
if(checkDataReader.GetString(0) == Password) { result = true; } else { result = false; } checkDataReader.Close(); DBConnection.Close();
return result;}Thank you Buddy Lindsey
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Jul 7, 2006
Hello,
I could save the file in the sql server database. The problem i am having is, I am not able to read the document from the database. I do not want to use response.outputstream......
I have to read the file for specific contents. Anyhelp would be great.
- Suresh
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Jul 25, 2006
Hi Everyone,
I am looking for some help, as i am pulling my hair out looking for information.
I have been using asp for many years and am now starting to learn .net. so far so good....
I am now wanted to connect to a database, execute a simple select statement and then read/write the information out. I can't help but think in old asp code and i am having a hard time finding what i need to perfom this simple task.
I have used the grid controls etc, and these are very good - however, i need to connect to a database in the code-behind file and perfom various functions in the background.
If any of you could be so kind as to perhaps show me some demo code i would be grateful.
I would like to do:
A) Connect to a database (sql server 2000)B) Execute a simple SQL select statementC) Read the returned informationD) put this information into variables used elsewhereE) how do you check if no records are returned? such as the .EOF in asp?
Many thanks
Darren
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Aug 25, 2007
I am able to upload a jpeg to a sql 2000 database into a column called graphic, the datatype is an image. for some reason i can read the image and have it displayed! this is driving me insane. any help would be greatly appreciated. here is the code to upload. and below that is the code to display the image.UPLOAD CODE If Not IsNothing(txtfileupload.PostedFile) Then 'Determine File Type Dim strExtension As String = Path.GetExtension(txtfileupload.PostedFile.FileName).ToLower() Dim strContentType As String = Nothing Select Case strExtension Case ".gif" strContentType = "image/gif" Case ".jpg", ".jpeg", ".jpe" strContentType = "image/jpeg" Case ".png" strContentType = "image/png" End Select 'Load FileUpload's InputStream into Byte array Dim imageBytes(txtfileupload.PostedFile.InputStream.Length) As Byte txtfileupload.PostedFile.InputStream.Read(imageBytes, 0, imageBytes.Length) 'INSERT DATA INTO DATABASE Dim objSQLConn As SqlConnection Dim strSQL As SqlCommand objSQLConn = New SqlConnection("server=srvdb1.rrg.local;uid=rsusr;pwd=Letmein123;database=rsdb") strSQL = New SqlCommand("insert into rsdata (graphic,contenttype,fname,lname,nname) values(@graphic,@contenttype,@fname,@lname,@nname)", objSQLConn) strSQL.Parameters.AddWithValue("@graphic", imageBytes) strSQL.Parameters.AddWithValue("@contenttype", strContentType) strSQL.Parameters.AddWithValue("@fname", txtfname.Text) strSQL.Parameters.AddWithValue("@lname", txtlname.Text) strSQL.Parameters.AddWithValue("@nname", txtnname.Text) objSQLConn.Open() strSQL.ExecuteNonQuery() objSQLConn.Close() lblStatus.Text = "Records uploaded" End If CODE TO DISPLAY Dim objSQLConn As SqlConnection Dim strSQL As SqlCommand Dim objSQLDataReader As SqlDataReader objSQLConn = New SqlConnection("server=srvdb1.rrg.local;uid=rsusr;pwd=Letmein123;database=rsdb") objSQLConn.Open() strSQL = New SqlCommand("select graphic, contenttype from rsdata", objSQLConn) objSQLDataReader = strSQL.ExecuteReader()While objSQLDataReader.Read() Response.ContentType = objSQLDataReader("contenttype") Response.BinaryWrite(objSQLDataReader("graphic"))End While objSQLDataReader.Close() objSQLConn.Close()%>
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Feb 20, 2008
Hello,I'm successfully using SqlDatSource to read data from SQL Server on a networked machine. Obviously I'd like to be able to update, edit or delete data, but the 'Advanced Sql Generation Options' in the SqlDatSource are greyed out.The result is that when I try and edit, update or delete I get this message Updating is not supported by data source 'SqlDataSourceDetails' unless
UpdateCommand is specified. Which makes sense because the options havn't been specified.I'm thinking this is probably a server side permissions issue but I've been through everything I can see and am now basically stuck.Any help would be appreciated Many thanks
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Mar 27, 2008
Hi all I've a page which shows data (25-30 entries) that are retrieved by an SqlDataSource. The query is very simple since i don't have to join any table.unfortunately sometimes I get the following error message. It's strange, since the page often works fine but the error occurs a couple of times per day.Who has an idea of how I could solve this problem?
Server Error in '/' Application.
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Apr 4, 2008
I have created a typed-dataset AuthorsDataSet and created a table in with name Authors, manually by right-click > New > Table. I have kept the data-types, sizes and contstriants exactly same as the table in the database, though I have kept the Column names different. I am filling the AuthorsDataSet with the following code on Form_Loadif (!IsPostBack)
{ SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["pubsConnectionString"].ConnectionString);
SqlCommand cmd = new SqlCommand("SELECT au_id, au_lname, au_fname, phone, address, city, state, zip, contract FROM authors", conn); using (SqlDataAdapter da = new SqlDataAdapter(cmd))
{
conn.Open();
da.Fill(ds.Authors);
grdAuthors.DataSource = ds.Authors;
grdAuthors.DataBind();
conn.Close();
}
conn.Dispose();
cmd.Dispose();
}
The connection string is as follows:<connectionStrings>
<add name="pubsConnectionString" connectionString="Data Source = localhost; Initial Catalog = pubs; Integrated Security = SSPI"/>
</connectionStrings>
The following error occurs when I run the page
System.Data.ConstraintException: Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints.
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Nov 22, 2004
Halo, I am a bit new to this
Please can someone help me, I would like to write a file(Any type) to a SQL database like a attached document(s) for the current record and be able to detatch the document when needed.
I use VB.NET for a ASP.NET app.
I basicly would like to attach documents to a piece of equipment may it be any kind and if the user views the equipment he will be able to detatch the documents for that piece of equipment and open it with the correct software.
PLEASE HELP!!!!!!!
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Nov 11, 2005
Hi i use sql server 2000 and i found problem in my database that is
when i write arabic language and closing my table and open it again i found all my data like question mark.
what can i do to save my data with arabic language.
note i use windows 2000 server.
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Mar 24, 2008
I have a database that contains news items. There's a column that contains the actual article. In that field, there are paragraphs with page breaks. The page breaks in the database are represented as squares (unrecognizable characters I guess). When I try to read in the data, it doesn't recognize the page breaks, and it comes out all in one large paragraph. Is there any way to get around this?
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Feb 14, 2008
Hi,
I have a data structure called 'Quote' which contains a number of different variables and controls ranging from text boxes, check boxes and radio buttons, i need to be able to read and write this from a database.
First I think a description of my overall project is needed:
Project Description
I have been given a brief that basically says: i have to create a programmed solution in VB to solve a problem. This problem can be anything we like, and I personally have chosen to create a program that manages quotes for building Log Cabins (this is very contrived and far from anything someone would do in the real world).
My solution will allow a generic user to create a quote (using a form with controls such as text boxes, check boxes, radio buttons) , and then save this to file. These users may then wish to load/edit this quote at a later date, from another form.
Whilst completing this project, i'll only have up to about 5 records (quotes) within the system, so i dont need the ability to store hundreds of records. And each record will be relatively short, with only about 10-15 data items within the data structure.
Also the Admin (or business owner in this case) need to be able to view all saved quotes in a presentable format, and edit them if needs be, from within this same program.
This solution does not need to be absolutely perfect and 100% efficiently coded, or have all the bells and whistles a real-world program would have. This is for an A level computing project by the way.
So basically, i need to be able to read from the database (to populate a Data Grid (i imagine this is best way?)) and so Admin can access any quote and edit it (editing is not vital, but viewing/printing is. Maybe i should stop at just viewing any quote?). Also i need generic users to be able to fill in the Edit Quote form and then save this data into the database.
And is a data structure really required for me to use a database?
I've never used databases in VB before (but have used them elsewhere, mainly Access) and so am completely new to this. Any help will be much appreciated.
Thanks
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Jan 18, 2007
Hi, i'm writing a SOCKET Port Listener for a Database, it must be multi-threaded and listen on a port for a record that when it comes in, it must write the record to the SQL database (MS SQL Server). I've got the listener to read the data over the port already and write the record into a string which i have already sliced up. Now i need to create a connection to the database and insert the variables into the database.
If Someone will please be able to give me a rough idea of how i could accomplish this with some sample code, then i will be greatful, i'm new to C#, but here is my code that i have so far.
//This is the Connection that i have made and where i am currently stuck, i dunno how to go further. Any help will be welcome.
public class ConnectionToMSDatabase
{
public void InsertDataIntoDatabase(string TableName, string connectionString, string dataFields)
{
string InsertSQLStatement;
InsertSQLStatement = "INSERT INTO " + TableName + " VALUES (" + dataFields + ")";
OleDbConnection ConnectionToDatabase = new OleDbConnection(connectionString);
ConnectionToDatabase.Open();
OleDbCommand command = new OleDbCommand();
command.Connection = ConnectionToDatabase;
command.CommandText = InsertSQLStatement;
command.ExecuteNonQuery();
command.Connection.Close();
}
}
//Here is my connection string, all the retrieved data is stored in a string array call fullRecord
ConnectionStringToDatabase = "Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;User ID=" +
"Administrator" + ";Initial Catalog=FORGE;Data Source=FORGE";
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Jun 6, 2007
Hi everyone I have a directory that contains a lot of text files that have data I need to draw from. I want to know if it is possible to write a program that will read all of the text files in the directory and pull out data and save it to a new textfile. For example: Each text file is formatted this wayColumn1, Column2, Column3"1","xxxx","yyyy""2", "xxxx", "yyyy""3", "XXXX", "yyyy" I want to put all lines that begin with 1 in one text file, all the lines that begin with two in another text file, and the same with all lines that begin with 3. my problem is I want to be able to point at the folder that contains those files and have it read every text file in the folder and perform the operation. If this is possible can someone point me in the right direction on how to get started.Thank you for any help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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Jan 4, 2006
Hi all,I'm a complete newbie on ASP.Net.I want to get some data out of a SQLserver Database running on my system with SQL Server 2005 Express. The name of the Database is 'tempdb' and the table is called "Members". the SQLServer runs as Local System with the Windows account.When I try to open the site, I always get the same error:Invalid object name 'Members'I don't know what to do anymore. I read a post, where anybody set the rights for the owner, but my database is running with the Windows account.Here is the Code of the page so far:<%@ Page Language="VB" Debug="True" Strict="True" %><%@ Import Namespace="System.Data" %><%@ Import Namespace="System.Data.SQlClient" %><script runat="server">Sub Page_Load (ByVal Sender As Object, _ ByVal E As EventArgs) Dim connStr As String connStr = "Provider=Microsoft.Jet.OLEDB.4.0;" connStr += "database=tempdb;" connStr += "Truster_Connection=yes"
Dim conn As New SQLConnection(connStr) conn.Open() Dim sql As String sql = "SELECT COUNT (*) FROM Members" Dim cmd As New SQLCommand(sql, conn) Dim ergebnis As String ergebnis = cmd.ExecuteScalar().toString() Dim t As String t = "Die Tabelle Members hat " & _ ergebnis & " Zeilen. <br>" & _ "Das Kommando lautet: " & _ cmd.CommandText & "<br>" & _ "Der Kommandotyp ist: " & _ cmd.CommandType ausgabe.innerHTML = t End Sub</script><html><head><title>Demo zu SQLCommand.ExecuteScalar</title></head><body><h3>Demo zu SQLCommand.ExecuteScalar</h3><p runat="server" id="ausgabe" /></body></html>Thanks for your help an sorry for my english.GreetsFlash_Prince
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Apr 28, 2015
Basically i have 3 images capacity per record in my asp.net application. In there i am saving the image path with record id in database and image in my application folder.
Now i am creating SSRS Report in Report builder . In there i have taken one image control to show the images. In the Image properties in report builder i have chosen database under the select the image source field. then inside use this field i have chosen image url and in use this MIME Type i have selected image/jpeg. Now i have saved this report in report server folder.
Now while calling in .net web from through report viewer control. It is opening the report but wont showing the image.
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Jul 16, 2007
hi guys, Can anyone advise me how how to read an excel doc i have stored locally? I need to be able to start the read from say row number 6 and finish the read once i get to a row that contains a pre-determined word signifying the end of processing. I intend to store the parsed data in an array that will be used as the data source for a gridview or repeater object on another asp page. I'm using ASP.net 2.0 and C# by the way. thanks in advance for any help!!!
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Jan 13, 2004
Why won't this dataReader read?
Dim objCon2 As New SqlConnection()
objCon2.ConnectionString = "a standard connection string"
objCon2.Open()
Dim objCommand As SqlCommand
objCommand = New SqlCommand(strSQL, objCon2)
Dim objReader As SqlDataReader
objReader = objCommand.ExecuteReader()
Label1.Text = objReader("email")
strSQL is a select command which I've checked (using SQL Query analyzer) does return data. I know the connection string is valid (and I presume if it wasn't that it'd fail on objCon2.open, which it doesn't).
So why oh why do I get this error on the last line (and yes, there is an "email" field in the contents of the reader)
System.InvalidOperationException: Invalid attempt to read when no data is present.
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May 30, 2001
Does anyone know how to read transaction log besides trace and profiler. The current situation is some one in our org. deleted an item and I'm trying to find out who and when.
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Feb 9, 2000
I have some records that have been deleted. I need to find out who did it and to do that I need to read the logs. Are there any utilities that will allow me to read login 7.0? How about 6.5?
Chris
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Dec 22, 1999
Here is I think an interesting question
is there a way to read or access the transaction log of a
database in SQL server 7.0
Hoping someone has a solution :-)
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Nov 2, 1999
We are having continual problems with our transaction log filling up on one of our major applications.
Does anyone know of a way or tool to read the transaction log? We want to determine what is causing this problem.
Thanks
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Jul 12, 1999
Is there a way, in SQL 7.0 to print out or view what's in the Transaction Log? In 6.5 you could view the table syslogs, but I don't see any documentation anywhere on how to do this in 7.0.
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Apr 8, 2005
I receive in a table a field which is an xml string
like below
<NewOrder><SiteID>CJC</SiteID><patID>458887</patID><LName>Cronin</LName><FName>tim</FName><EntryID>{7B1A4946-CEC8-4F23-AE89-5C70A6A0F9B2}</NewOrder>
Is there a way read this field with a select statement? I need to strip out the entryid value in a trigger
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Aug 23, 2001
I received a SQL Server 6.5 database (.dat file) on a removeable drive. I'm currently running 7.0. Is there any way to read/import/link to this data without installing 6.5. And if I have to install 6.5 how do I get the system to see the database?
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May 24, 2002
Hello people;
Somebody knows some utility where I can read the Transaction Log Sql 2000 ?
Thanks;
Navlig®
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Jun 10, 2002
Hi
How can I read an ini file entry and pass this parameter to a stored procedure which will be run in a DTS Package?
Thanks for the input
mipo
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Sep 19, 2001
Anyone know a way to read DTS packages? I have inherited a DTS package, saved in SQL, and am trying to find a way to read the steps without having to view every single step through the GUI.
Thanks in advance.
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Sep 1, 2006
Hi,
I need to know that how can we read ClientProcessID (älso use used in SQL Profiler).
Regards,
Shabber.
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May 20, 2008
Hi. I want to write a function to retrieve all records from a "Parts" table so that I can read these records in .NET.
SqlDataReader reader = sqlCmd.ExecuteReader()
while( reader.Read() )
{
int x = reader["id"];
string partName = reader["name"];
// Do stuff with data here //
}
My question: How should the function be written?
Should I create a PROCEDURE and just call a SELECT statement?
CREATE PROCEDURE getPartsList()
AS
SELECT part_id as 'id', part_name as 'name' FROM parts
Or should I create a FUNCTION that returns a TABLE? If so, is this the correct syntax?
CREATE FUNCTION getPartsList()
RETURNS TABLE
AS
RETURN (SELECT part_id as 'id', part_name as 'name' FROM parts)
Thanks for reading
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Jun 9, 2014
The requirement is to read XML element from database column.The column looks like
<ClMetadataDataContract xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://www.cch.com/pfx.net/psi/">
<EntityType>1</EntityType>
<NameLine1>David Jones</NameLine1>
[code]....
I have also tries OPENXML but no luck
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Jun 22, 2008
How do I view the SQL 2005 transaction log file(.ldf)?
Is there a built-in utility?
Thank you
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Jun 24, 2008
I am storing one text file on the server.This text file contains some mobile numbers.The file look like
009198XXXXXXXX
009198XXXXXXXX
009198XXXXXXXX
009198XXXXXXXX
etc
Here I need to read this text file row by row mobile number and then insert these mobile numbers into a table by using sql procedure or sql trigger or any other method or coding. Is it is possible or not?
If so then anybody can help me!
regards
Shaji
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