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 :
[code]....
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 :
[Code]....
questionID is auto increment.
The question is : How i get questionID after adding to database without using sql statment ?
I got a table PartsMedia where I can insert all the images related to a product. The table has the columns :
PartsMediaID , auto-increment
PartsNo
MediaLink
MediaDescription
CatalogCode
SortCode
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')
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 have a gridview with the serial no , I want to increment the serial no automatically when i insert new row
How can i ?
I use SQL Server and when I create a new table I make a specific field an auto increment
primary key. The problem is some people told me making the field an auto increment for the primary key means when deleting any record (they don't care about the auto increment field number) the field increases so at some point - if the type of my field is integer for example - the range of integer will be consumed totally and i will be in trouble.
So they tell me not to use this feature any more.The best solution is making this through the code by getting the max of my primary key then if the value does not exist the max will be 1 other wise max + 1.Any suggestions about this problem? Can I use the auto increment feature?I want also to know the cases which are not preferable to use auto increment ..and the alternatives...note :: this question is general not specific to any DBMS , i wanna to know is this true also for DBMSs like
auto increment alphanumeric primary key(eg :ABC001) in sql server 2005 database table.
View 2 Repliesin 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
there is 2 pages the first page include gridview its fill from xml file and there is button (Called add new student) when i click on this button its arrive me to second page and the second page inckude 5 Text box if to add new student.
** the problem with the ID of new student its can be show on the head page like this (http://localhost:57175/gridvieww/Default2.aspx?ID=8) i want head the ID number i am using query string now i want code to find the last node in xml and then increment +1.this is my codeÂ
XML codeÂ
<Students>
<Student>
<ID>1</ID>
<Name>hammad</Name>
<Email>hammad@xml</Email>
[code]....
i am using one text box in New registration page. when ever user clicks on New registration button, The text box of record number should be auto incremented.
View 12 Repliesi was given a form in which empid is varchar and i m supposed to auto increment it using a function and calling it ....i have never done this. plz help me out the way .
View 9 Repliesi 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.
If its posible I want to create a table with a primary key with auto-increment and a fixed value to differentiate the table from others tables
ex:
table 1 | table 2
ID | ID
----------|-----------
a1 |b1
a2 |b2
a3 |b3
show me what is the syntax to add an increment column to Select Query? There will be additional column which goes 1,2,3 ... n.
View 3 RepliesI have stored procedure where i am creating table and setting primary key how to set auto increment ?
set @sql =@sql +
'CONSTRAINT [PK_'+@Table+']
PRIMARY KEY CLUSTERED ([ID] ASC)) ON [PRIMARY]'
I am trying to set up an insert command in vb for sql server (not mysql). the following works fine as long as I manually enter a new ASSalesId and don't have this field auto increment. this field is set up a a primary key. I would like to just use auto increment on this field. but every time I set the field to auto increment the insert fails. if I just remove the reference to this field from the statement the insert fails.
Sub SQLDatabaseEntry()
I want an auto increament using stored procedure how can I do this process. I want a reference number in this procedure ...
ALTER PROCEDURE [dbo].[Emp_Detail] (
@Name varchar(max),
@Emp_No varchar(50),
@Job_Title varchar (max),
@Nationality varchar(50),
@Administration varchar(50),
[Code] ....
I creating a real Estate web application. I have a form where the admin can type price for a specific property. The price will be insert into the SQL database.
Which is the best SQl data type to store for example : £150.000 and then retrieve it from the database. It has to be any type of SQL data that store number as I have a search on the website that compare values of numbers. It cannot be for example varchar othewise I will get an error.
How can I autoincrement the value of a boundfield column in a gridview ?
View 2 RepliesI 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 am using asp.net chart control, problem i am facing is that it automatically generates values in Y-Axis.
As you can see in image , values 0, 3 and 4 are automatically generated. how to hide these automatic generated values.
I have a data type mismatch while inserting into a number field in an access database using a parameterized query.I think this should be pretty simple but I am still learning a lot.
[Code]....
I have some commented out as I am working one field at a time. The working fields are textboxes and the non working ones are dropdown lists. But I think it may be the field that the list is drawing from? Not sure.
What i want to do is read from a database where the catalog = 12 and then have a button on the page to add a new catalog named 13 so it takes the 12 and adds 1 to it so everytime they click the button they will get a message saying "are you sure you want to create anoter catalog?" and if yes then it executes.
View 5 RepliesI have a Formview where user is selecting the date and time via dropdown values. I am trying to set the value of the field when the record is being inserted for some reason my database still displays a null value.
Protected Sub FormView1_ItemInserting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.FormViewInsertEventArgs) Handles FormView1.ItemInserting
CType(FormView1.FindControl("txtActivityDateTime"), TextBox).Text = CType(FormView1.FindControl("ddlMonth"), DropDownList).SelectedValue + "/" + CType(FormView1.FindControl("ddlDay"), DropDownList).SelectedValue + "/" + CType(FormView1.FindControl("ddlYear"), DropDownList).SelectedValue + " " + CType(FormView1.FindControl("ddlHour"), DropDownList).SelectedValue + ":" + CType(FormView1.FindControl("ddlMinute"), DropDownList).SelectedValue + " " + CType(FormView1.FindControl("ddlAMPM"), DropDownList).SelectedValue
End Sub
I have an integer field in my sql database and I have an xsd set up with all the CRUD operations. I need to put the value in a variable into the this integer field. Sometimes the value is 'nothing'. I have option strict on so there's no conversions going on by itself. If I hard code 'nothing' into the insert query, it works fine. Here's what happens otherwise:
1) If I put a variable into the query, when I assign 'nothing' to the variable, it becomes 0 so it puts a 0 into my database.
2) If I use an iif( ) statement, it also converts 'nothing' to 0
I don't seem to have any way to get a nothing in there if I don't specifically write 'nothing'.