DataSource Controls :: Create An Auto Incrementing ID For Table Rows?
Apr 27, 2010
I have an ID column (int) in my table which also needs to be a unique key.
last time I worked with a database (BD2), I set this as an autoIncrement feild and it would automaticaly 'deal with it' (ie, maintain the last used value somewhere and automaticaly used that value (after incrementing it) for any new row on the table).
How do I handle this in ASP.NET. Especially, as I try to add a new line based on form content when the user presses on a button (C#).
I have a simple online web system where it possible for the visitors to "play around" with the system. They can like create categories and products and so forth. Everything they create are stored into a database.
What I want is to be able to reset this database with my default values (table data) every n hours.
So for example if we have a bunch of users that have played with the system and created new things. Then I want to be able to make some kode that deletes all data in the tables in this database and fill it with default data. The default data can come from a backup file, or another database with same tables structure or whatever.
I want this task to be done every day at 12 pm or every n hour.
Is this possible (by forexample scheduled webservice tasks or just something as long as it is simple).
I have one big DataTable with X rows. I want to select Y rows from it and bind them to a new ViewList. While doing it, I want to delete these rows from the DataTable (Having X - Y rows).
What is the best and fast way to do it?
I don't know if it is better to create a new DataTable to have the Y and after that bind them to a ViewList or something else?
I'm also looking for example in code how to select/delete rows from DataTable.
in my aspx page user is creating a request and when the request is created a request_id is generated automatically in databse..i want to retreive tht particular request_id and display it on the same web page.
here is my code-
protected void Button1_Click(object sender, EventArgs e) { String selection = DropDownList1.Text.ToString(); String status = "inactive"; try { ConnectionStringSettings set = ConfigurationManager.ConnectionStrings["WATERMARKING"]; String cns = set.ConnectionString; SqlConnection cnn = new SqlConnection(cns); cnn.Open(); String query = "Insert into REQUESTS (USERNAME,REQUEST_TYPE,STATUS) values ('" + uName + "','" + selection + "','" + status + "')"; SqlCommand cmd = new SqlCommand(query, cnn); cmd.ExecuteNonQuery(); //Response.Write("Request created Successfully "); //MessageBox.Show("request created successfully"); Label4.Visible.Equals(true); Label4.Text="request created successfully"; Label5.Text = "Your Request ID is"; Label6.Text = "ID required to Check the Request Status"; } catch (Exception err) { //Response.Write("error generated while raising request"+err); Label4.Visible.Equals(true); Label4.Text = "request creation error"+err; } }
here wen a value is getting inserted in REQUESTS table a column named REQUEST_ID gets populated and i want to display that value on the web page
i have a question, suppose i have a table 'tblImage' which have 3 rows of data and my auto increment is not +1.
imageId imageName 1 a.gif 2 b.gif 4 c.gif
i want to query '2' using LINQ C# to the table in MS SQL and show the record which i have done easily BUT now i want to get the next auto incremented value to make Next button on the sane web form, which is in this case is '4' and i also want the previous imageId as well.
I am using LINQ to store and retrieve data from tables with a clustered index key. However, I also need to know how to obtain an inserted table row identity with an auto-increment Primary key. The "Go To Definition" feature for my data context of dataClassesDataContext provides the following information:
[System.Data.Linq.Mapping.DatabaseAttribute(Name="EFMDB")] public partial class DataClassesDataContext : System.Data.Linq.DataContext
I am asking for the C# code that is needed in a button click event handler that will insert a row of data in a table named "Fields". It only consists of an auto-incrementing primary key column (FieldID), a string column (Phrase) and a null defaulted variable column.
any stored proceudre in which incrementing of integers, floating point nums alphabets and alpha numeric value incrmenting take place based on the datatype entered.
Iam working on an asp.net application.Recently client come with new requirement. Need a control which is similar to table or like gridview with rows and columns.It should allow user to enter data in the cells. And when the user press tab it should go to next cell and finally if we press enter key, it should validate the data entered in the current row and if data is correct it should create a new empty next row(like entering data manually in an sqlserver table). How can i implement this functionality? Can i use gridview / javascript to implement this functionality.
I would like to be able to read the first row of a table and then each successive row sequentially individually. So, is there a way to read the first row of a table, whatever the primary key may be, and then read the next sequential row in the table until the last row has been read? I need to be able to do this in order to create a list of column entries in each row for a listbox control that a user can select from.
I'm assuming I need to use a pivot table from what I've found so far. However, every one that I've seen has not had the date setup like I have.
I have a Gridview on my page which I need to be populated like so
Date NCMR
1/1/10-1/31/10 #
2/1/10-2/28/10 #
I want to do this for 10 months... bottom record being the current month (or last month). I would also like the Date to format to January 2010 I used the above date format because that is how it is in the table. Basically, I need to know how to create the pivot table to search the table for 1/*/10, 2/*/10, etc
I'm trying to figure out how to update multiple rows in my Directory table, when a user changes their Street Number or Street Name in their profile. They can add multiple users to a directory and each user they add to the directory has this primary users UserId in it. So if the primary user changes their address, I want it to update the address for all the users they listed in the directory as well. I'm adding this to the On_Click in the Code Behind, so when they click to update their profile, it fires this function as well. This code may be way off, but here's what I have right now:
How do I remove duplicate rows from a data table based upon a two column values;I want to pass in a Data Table and a column names and get the data table back with data rows where that columns value are unique.
I have a Data Table with Duplicate Rows i want to delete the duplicates rows based upon two column values if both columns values are there then Delete the row.
I am using asp.net3.5,sqlserver2008. I have retrieving data from Accounts,BUDGETS like this.
select a.AccountLink,a.Master_Sub_Account,b.* from Accounts a inner join BUDGETS b on a.AccountLink=b.GLLink where a.AccountLink=1 output of my query... AccountLink Master_Sub_Account GLLink AccType Budget01 Budget02 Budget03
I've have to delete multiple rows from database in a table . Which is the best way to delete data to optimize performance of sql server as well as asp.net.
I have ASP.NET enviroment (C#) with SQL 2008 backend. I am using the ASP.NET membership provider. I need to create a table that contains member name, member role and third coumn (called "Registered for Conference"). I am using a button to initiate the action to call a stored procedure to write the selected value in the "Registered for Conference" column for the respective member.I know how to write the stored procedure, how to determine which user has processed their selection and how to write it to the "Registered for Conference" column of the table.I know that I can pull member name and member role with the following statement.
SELECT dbo.aspnet_Users.UserName, dbo.aspnet_Roles.RoleName FROM dbo.aspnet_Roles INNER JOIN dbo.aspnet_UsersInRoles ON dbo.aspnet_Roles.RoleId = dbo.aspnet_UsersInRoles.RoleId INNER JOIN dbo.aspnet_Users ON dbo.aspnet_UsersInRoles.UserId = dbo.aspnet_Users.UserId
I need to understand how to create the table that will contain the member name, member role and third coumn (called "Registered for Conference"). This table cannot be a static table. In other words, this table needs to refect any updates to roles or members
I single table in SQL Server having 50 columns col_1 to col_50 having type varchar(MAX)..The table is having nearly 2 crore data into it which is unstructured i.e. just put in by bulk copy. I have to perform search operation on this table. How to index the table so as to make the search fast? or any other way to make the search fast.
I have a strange issue. I have a XSD file where I have created some TableAdapters. When I have reopened the XSD file it seems like I am not able to create a new table adapter since all the options which will come when I right click on the XSD file are disabled. I have cross verified whether I am on debugging mode but...I was not..(I am not even able to drag and drop an adapter from the left toolbox menu either)I am getting the same issue when I open the same XSD file on somebody else machine but I am able to create TableAdaperts in other XSDs.Can somebody suggest me a solution for this
I have read up on uploading multiple images and storing them to a file but so far i am only able to store one image into both file and into database. The problem i have is that i don't know how to create the table to store more than one image?
I have a table that contains item data. If the item is a particular type further information exists to describe the item. The additional information isn't that heavy however the number of records in relation to the main file will be quite small (less than 5%).
So I have 2 scenarios:1) Put the additional data in the main table and take tha hit on storage
2) Create an additional table and link the 2 together
If we were talking huge amounts of data I can understand that 2) would be the obvious choice but given the simplicity should 1) be a consideration?
If 2) is the answer - is it possible to create a dependency between the 2 tables when the item is 'that' particular type. In other words wnsure the addition data is populated for the required items and not others.
