VS 2010 - How To Set Primary Key In New MySQL Table
Jun 20, 2012
I have a data connection to an existing MySQL database. The database has various tables. I am creating a new table, and want to set the ID field to be the primary key. I can not see a way of doing this inside Visual Studio. I saw one suggestion to right click on my ID field in either the Server Explorer or XSD and select Set As Primary Key (or something like that), but I don't have that option displayed.
i get the following exception (missing primary key) in the line of using Find() method "Table doesn't have a primary key." I've rechecked the Database and all Primary Key columns are set correctly.
DataTable dt = p.GetAllPhotos(int.Parse(Id)); DataTable temp = new DataTable(); temp = dt.Clone(); temp = (DataTable)(Session["currentImage"]); DataTable dtvalid = new DataTable(); dtvalid = dt.Clone(); DataRow[] drr = new DataRow[1]; drr[0] = dt.Rows.Find((int.Parse(temp.Rows[0]["photoId"].ToString()))+1); foreach (DataRow dr in drr) { dtvalid.ImportRow(dr); } dtvalid.AcceptChanges();'
i done one web application in this application i need to transfer the data from one table to another automatically when the time is 10.00PM. i need to write this function sepearte time function not in page load function.the user select any of page the data should be transfer from one to another without page load only using time control function..
How can we map a table without having primary key in nHibernate.I have a table which does not contain any primary key, so how can i map this table in .hbm.xml file.
I need to copy the records of a row to the next available row in the same table. I tried with "Insert ...Select " but it throws me a error since the pk is auto-increment. Also, i cant specify each and every column inside the insert...select statment cause i've almost 30 columns.
I am working on a database with about twenty tables. In one of the tables "Customers" their is a column with
a primary key. Call it "CustomerNumber".
The problem is that we log customers from multiple vendors and so we might have the same customer number, but from different vendors. So really this would be a perfect situation where we could set up the primary key to be a composite key consisting of the Vendor and CustomerNumber combination.
The integrity of the database is not very well maintained because the Primary Key CustomerId is never used as a secondary key in any of the other tables.
So here is my question. Instead of making a primary composite key, can I just drop the primary key all together?
This is one of those questions I really hate to ask, because typically I would never lean tword this drastic of a measure to solve a problem. Because of other situations I can't discuss this might be the best alternative. So would it be okay to drop the primary key constraint all together?
I have a table with composite primary key and this key includes two values referring to two other tables. Now I need to implement Edit feature for this Original Table but I wanted to have dropdown lists while editing pointing to look up tables(composite key values are primary keys for two lookup tables). for eg.
I have a table that get populated via an external text file. I am not sure of the exact process as I'm relatively new to the company.
The table does not have a primary key as the entire table is dumped and re-loaded every quarter when there is a new text file.
Enter ASP.NET MVC. I need to display that table with checkboxes in a grid so the user can select some rows and send it back to the server. It sounds relatively easy, but I am really not sure what to put as the value for the checkboxes as I am pretty sure I'll need to use multiple columns to create a unique. Yep, I know, I know :).
Would something like this work? If I can create a key with a few fields, can I use those fields as the value in the checkbox? I realize my action will be a bit ugly as I'll have to split and parse each value in the array of values.
Not sure if this is the best place for this. I am using VWD 2010 express. I want to connect to a MySQL database on my web server at 0000free, a free web hosting site. I'm not exactly sure where to start. I have looked at MySQL for .NET can't make much sense of it. I have been looking for information all over the place maybe someone here can help me.
I am a rookie developer here and I have tried looking around for an answer but I am little confused. I have a stored procedure that calls multiple stored procedures when I go to create a new contact.[Code]....
I though I could use the OUTPUT Command to copy out the NewContactID but I am getting all kinds of syntax errors. I am confused as to what I am missing here.
There is one table which primary key is ID and its data type is Integer with auto increment. Gradually the value has increased and I want to change it to hold large amount of value.
So, Which in data type I have to change from Integer without effecting the previous values?
I am using asp.net 2010 with mysql database. Is it practical for large amounts of data ? say 10 million records ? cuz some people said to me that using this combination, i'll be having performance issues as database grows.
I am trying to insert a record into a MySQL table, but the operation fails without generating any error. Here is what I have:
Code: Try n = taProject.InsertNewProject(pname, descr, idManager, startdate, tenddate, client, disable) Catch ex As Exception Beep() End Try
[code]....
I am not passing idProject, which is the primary key, and set to autoIncrement..How can I get any diagnostic output from the insert attempt to indicate what the error is?
Using a very run-of-the-mill database, with identity int for primary keys, a Dynamic Data Entities Project (EntityFramework) displays the primary key for view and edit. When using Linq to Sql, the primary key fields are not displayed.
I would like to hide the primary keys and use Entity Framework (VS 2008, .Net 3.5 sp1).