i have a topic like this before and it has been resolved using dataread. But now, I want to ask on how to do it via dataset.
My code is:
[Code]....
What I want is to read the from the dataset the maximum value so there will be no need to open a connection from the database.
I have a simple list of data in my database that I call to my page. I have used the asp.net 'reorder list' ajax control to provide a drag and drop way of managing the sort order of my data. It uses a 'position' column in the database to do this.
How do I go about making sure that when inserting data to this table, the new item gets assigned the correct 'position' value? For example if I have 9 items already in my table, I want this newly inserted list item to get assigned a value of 10 in the position column.
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'm still relatively new to asp.net I'm trying to figure out the best way to write and implement this.
I have a cell that needs to autoincrement by 1 for every new database row in my table, Unfortunately I have to have the autoincrement restart at 1 at the beginning of each year so I can't use SQL Server identity increment. Maybe i'm wrong about the last statement and I just don't know how to do it.
The code i have is something like this:
If thereadedyear <> Now.Year then
theReadedYear = Now.Year
SomehowWrite readedYear
StartNumber = 1
Else
StartNumber =+ 1
End if
How do I implement this in a Insert Template?
I'm trying to get an IDENTITY column to auto-increment with each new row inserted, so that the field (userid in this case) can be used as a unique identifier.
However, I'm getting this error:
[Code]....
My code looks like this:
[Code]....
I don't understand - if I have to explicitly insert something into my auto-increment column, how do I know what to insert? Isn't the point of an auto-increment column that it's... auto?
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.
I'm trying to define a computed column that will contain an auto-incremented number. In other words, I want it to work exactly like identity, but since I can have only one identity column per table, I wanted to make a computed column that reads its latest value and increment it by 1.
View 5 RepliesToday I am facing the problem with Typed DataSet using DataSet.XSd file, And How to fetch, Delete and Update the Database through Dataset.xsd file.
View 9 Replieshow do i copy required row in dataset to a new dataset. i have bind a xml into a dataset and i need to display say row 3 to 5 only so i do a for loop but i have encounter problem when trying to copy the rows to a new dataset.
do i have to write the xml to datatable and bind it to dataset and from there copy over ?
Of course, every registration needs a primary key like a registration number. I have a textbox that is visible(for now) and I need to have the value inside it(100001) to increment by 1 for each different registrations. How do I achieve this? I need it in C#.
View 16 RepliesIn myapp, I can create two datasets: [dstServer1] and [dstServer2]. They are coming from two tables which are in two different SQL server: [Order1] (in server1) and [Order2] (in server2). These two tables have the same data structure. How to code to compare two dataset and then insert difference into another table without using linked server?
View 2 RepliesI have a problem, I need to get a date from an SQL database using a dataset.xsd.
To do that, I have created a query in the TableAdapter called GetDataByFecha:
SELECT fecha
FROM T_Tickets
WHERE(fecha = @fecha)
in C# I do this:
DateTime T_fecha;
T_fecha = Convert.ToDateTime(ticketsAdapter.GetDataByFecha(fechaTicket));
but, when I compile it I get this error:
cannot convert a 'T_TicketsDataTable' object to 'System.IConvertible' type.
I have dataset which is called at page load event. Also every time i clicked on refresh it will call refresh function where it store updated values from database.
Now I want only updated fields row and want to store into datatable or another dataset.
I dont want to cmp each and every iteration of the dataset. I used Getchanges() of dataset but not working.
I need to modify a dataset column's value. I tried using the following code but it's returning "Input string not in correct format error".
for (int iCount = 0; iCount < dataset.Tables[0].Rows.Count; iCount++)
{
dataset.Tables[0].Rows[iCount][23] = "Test";
}
What are the advantages and disadvantages of linq to sql and ado.net dataset?
Which method should I use to connect, retrive, update and generally operate on data from a ME SQL database?
how to get records from database and display in datagrid w/o using dataset/datareader?my requirement is not to use Using System.Data namespace
View 5 RepliesHow to display Top 10 Records using DataView Or DataSet, Below is my code. I am using .net 2.0 and i don't want to Modified in my SQL query.
Dim ds As New DataSet
ds = tv.GetSearchLatestEvtHosting("", "", "", "", "")
Dim dtvCust As DataView = New DataView(ds.Tables(0))
i am using dataset,i retrived the values from the database and i deleted from the data set .is it possible to get values back?
how can i get those values?
MY CODING
string studentno = "select regno from stu_ref where batch='" + dropbatch.SelectedItem.ToString() + "'";
SqlDataAdapter dastudent = new SqlDataAdapter(studentno, cn1);
DataSet dsstudent = new DataSet();[code]....
form the above coding i will get all values form the table stu_ref of regno of student now i need to get the first and the last regno from the table
for eg TextBox1=103301
TextBox2=103378
the total no of student=78
public static DataSet GetSubCategories(int category_id)
View 4 RepliesI have a DataSet that I bind to a GridView control. I want to only show certain columns from the DataSet. Should I do that with my SQL query (that I use to populate my DataSet) or somehow with a DataView?
View 7 RepliesI'm trying to remove extraneous characters like quotes, commas, etc from my dataset. I get the fact in the standard way of doing things in your code behind you simply go
string data = data.replace(",",""); or something like this. However, a datasource doesn't seem to give me that capability. What can I do to make it do this? I'm importing data from an excel sheet into a gridview. The commas are goofing up my view. I'd like to replace any commas in the dataset with spaces. Here is the code I have.
[Code]....
I'm fairly new to asp.net and I'm trying get my arms around the data entry and update. I have created a nice data entry formusing a stored procedure. It works well but for a test database, it's pretty much overkill, but worthwell in learning how. I'm going through the ADO.NET quick start tutorial and I've ran across a couple of questions that I've not be able to answer. In my website,I'm wanting to edit the database by creating a separate form that is filled with the existing database information for that particular id. My main question is how to I take the information from the dataset and get it into my form. The code below is not fillingmy form. Not sure what I should be using here:
[Code]....
I've managed to connect to the database and return a record based upon a login name. I can itterate through the rows printing out the password but I know there's only 1 row (or can test for that) so how do I get the value of the password for the one row without the loop?
Dim supervisorAdapter As New SupervisorTableAdapters.SupervisorTableAdapter
Dim supervisors As Supervisor.SupervisorDataTable
supervisors = supervisorAdapter.GetSupervisorByLogin(login)
For Each count As Supervisor.SupervisorRow In supervisors
Response.Write(count.password)
Next
Im currently filling a dataset using an SqlConnection and a SQLDataAdapter:
[Code]....
This method is causing other sql connections to timeout. What I would like to do is an SQLDataSource to fill the dataset. Is this possible?