C# - Inserting Row Into Table With Auto Increment Value?

Mar 23, 2011

I got a table PartsMedia where I can insert all the images related to a product. The table has the columns :

PartsMediaID , auto-increment

I want to insert a complete row with automatic increment and the PartsNo should be the same as the PartsNo from the PartsMaster table.

The medialink should be the PartsNo + '-2.jpg'
The mediadescription is for example 'image2'
The CatalogCode should be 'catalog'
and the sorting code should be '0'

From The partsMaster table I Just need the PartNo So I can add this to the PartMedia Table. The PartNo is the foreign key in the PartMedia table.

The following I got so far but no luck

insert into dbo.PartsMedia (PartNo,MediaLink,MediaDescription,CatalogCode, SortCode)
values (dbo.PartsMaster.PartNo, PartsMaster.PartNo+'-2.jpg','image2', 'catalog','0')

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ADO.NET :: Get Auto Increment Field After Inserting?

Dec 6, 2010

I'm adding a couble of fields to database but i need the primary key of the master table to add it to sub table.

The database contains 2 tables :

Question Table :questionID(primary key and identity) , questionInText

Answer table : answerID , answer1,answer2 , questionID

code used to insert to db :


questionID is auto increment.

The question is : How i get questionID after adding to database without using sql statment ?

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Dec 6, 2010

i'm working on my first project on asp.net using c#.

I'm adding a couble of fields to database but i need the primary key of the master table to add it to sub table.

The database contains 2 tables :

Question Table :questionID(primary key and identity) , questionInText

Answer table : answerID , answer1,answer2 , questionID

code used to insert to db :


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Apr 28, 2010

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2 b.gif
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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:

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.

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See Example:


See Flowchart/Code Behind (I created it in Visio)


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Nov 2, 2010

I use SQL Server and when I create a new table I make a specific field an auto increment
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Here http://www.codeproject.com/KB/macros/Increment_Build_Number.aspx

He says to download a file to do this for you...

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If you have had issues doing this I would like your warnings.

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set @sql =@sql +
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Sub SQLDatabaseEntry()

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Now, When I want to add new row, Then 4 TextBoxes shown to enter the ID, Title, Link, Date information.

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My code looks like this:


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?

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I followed the ASP.net official tutorial to create a DAL & Business Logic Layer [URL]. I have a table with a int ID field. I wish to write a function to add a new entry into this table but have the ID field auto-increment.

The ID field is set as the Identity Column and has a Identity Increment & Seed of "1". If I manually go to the table and insert a new record leaving the ID value null it automatically increments. But if I create a C# function to add a new entry I get an error saying that the ID field can't be Null. Is there any way to use the Update method as shown on line 14 below to add a new entry but with it automatically incrementing?

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Jun 6, 2010

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).

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Feb 8, 2011

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";
ConnectionStringSettings set = ConfigurationManager.ConnectionStrings["WATERMARKING"];
String cns = set.ConnectionString;
SqlConnection cnn = new SqlConnection(cns);
String query = "Insert into REQUESTS (USERNAME,REQUEST_TYPE,STATUS) values ('" + uName + "','" + selection + "','" + status + "')";
SqlCommand cmd = new SqlCommand(query, cnn);
//Response.Write("Request created Successfully ");
//MessageBox.Show("request created successfully");
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.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

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May 14, 2006

I cannot for the life of me get the Identity after inserting a record into a table using the Table Adapater.
I am using Text SQL Commands. I have configured the table adapter to "Refresh the Data Table" and the Insert SQL Command:

INSERT INTO [Item] ([name], [description]) VALUES (@name, @description);
SELECT itemId, name, description FROM Item WHERE (itemId = SCOPE_IDENTITY())

The Visual Studio generated Insert Method used the following to execute the InsertCommand

int returnValue = this.Adapter.InsertCommand.ExecuteNonQuery();
return returnValue;

This returns the number of rows affected.

I've tried changing it to: int returnValue = (int)this.Adapter.InsertCommand.ExecuteScalar();
however it returns null;

I've tried playing with the InsertCommand Parameters and creating a new parameter and setting it as a ReturnValue however this doesnt work either.

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Aug 11, 2010

I am working on a web app for an online photo album. It is the last project in Scott Mitchell's book: "ASP.Net 2.0 in 24 hours".

I am creating a page where users can enter new photo images. The functionality for uploading an image will come later. I am working on just inserting a new row into the Pictures table with an optional category, a required title and a required description.

I am getting an error when I try to insert a new row.

Here is a screenshot of the page with a shot of the dropdown list.

The Categories are user-specific. I am getting the correct values retrieved.


There are two pretty simple database tables involved here.

NOTE: The CategoryID and PIctureID are both autoincrement integer columns.


The page uses a DetailsView that uses a SqlDataSource that uses the Pictures table. (The DetailsView's Default Mode property is set to "Insert". The "Enable Inserting" checkbox is also checked.)

The dropdown list uses a dropdown control that uses a SqlDataSource that uses the Categories table.

When the "Insert" button is clicked the CategoryID value associated with selected (Category) Name on the dropdown list will be used along with the Title and Description values to insert a row in to the Pictures table. (If no Category value is selected, then a null value will be used for the CategoryID. This is OK because the CategoryID column in the Pictures table allows nulls.)

My problem is that I am getting this error:

Cannot insert explicit value for identity column in table 'Pictures' when IDENTITY_INSERT is set to OFF.

(FYI: I have the full version of both Visual Studio and SQL Server.)

Here is my source code for the page:


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Oct 8, 2010

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Dec 29, 2010

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I get the following columns from DS.Tables["ItemAttributes"]:





I get the following columns from DS.Tables["Item"]:





Item_Id from DS.Tables["Item"] and DS.Tables["ItemAttributes"] are the same

So I would like to insert the data into a table named amaz with columns as follows






My DataSet is fetched using the following code, There can be upto 10 rows in the dataset


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