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How to update a C# project with a data source when the SQL database has been modified

I have created a database with several tables. Using Visual Studio 2012, I created a DataSource object that connects to those tables and created a DataGrid and some forms using the data from the SQL database.
In the process of development I then made changes to the SQL database. In one case I designated a column as a key in a table I had neglected to choose a key for. Now I want my application and the DataSource object to recognize these SQL changes.
How do I do that?

OK Bill, I believe I understand the problem now. Yes there is a way through the GUI is Visual Studio to pull the changes from your database into the Dataset you have created. Here is how you do it. Open the Data Sources Tab -> Select your DataSet You can see that mine is called People.
Now, I have updated my database by adding another column called "Phone" that I want to add to my dataset. I right click on the dataset and select Configure Data Source With Wizard.
I will expand the data objects selection and select my new column value.
Then click finish and my Dataset now has the new column in it.
I hope this helps you.

Export and import button for all the data tables from database

I have a window form that have two buttons one for Export all the data tables in the mysql database & the other one for import all the data tables in case i lost them. So How i will can doing that's ??
Any one can help me with source code, I'm using phpmyadmin with C#
Thanks

You don't need to code it into c# , phpMyAdmin got Export and Import in it's tools you can find it in the main screen right after you login .
If you insist on making it in a c# code , try to deal with the database as if it's a file , which means that you will make your export button go to the database directory and copy the database file to somewhere else or send it wherever !
Note
Consider reading How to Ask
Edit
How to Export Db :
Log in to the phpMyAdmin instance on the source server.
Click the Export tab
From the database drop-down (left navigation), select the type of your database.
Choose between a Quick or a Custom export. The Quick method should work most of the time, though if you need to get more granular with your export options, click Custom
Select the format from the Format drop-down
Click the Go button.
Save the file (which, by default, should be named *.sql

How to change the table name in visual studio 2013 in design mode?

I created a SQL database table in Visual Studio 2013. I want to rename it but the name property is disabled. How can I change the table name?

In Server Explorer right click on Views and click New Query.
use this code to rename table:
EXEC sp_rename 'Table', 'NewName'
then click on Execute button.
after 5-30 seconds in server explorer click on refresh button.

You can change table name in SQL Server Object Explorer in Visual Studio. Choose the table in tree and rename by right-click on the table -> rename

The correct answer as follows:
1.First select your table that you want to change.
2. Then change the name in the script pane.
3.Finally in the upper-left corner of the Table Designer, choose the Update button.
Please as shown below:

Ive been trying to too, and the simple option to rename the [dbo][Table] did not seem to work.
But it actually does! Please note that refreshing doesn't work right away.
Steps:
rename [dbo][Table] to [dbo][yourTable]
press update button
Refresh a few times, it may take a minute.
Hope this helps :) It seems a like really wierd bug.

You can change table name in T-SQL part as showin in image as follows..
CREATE TABLE{dbo].[t1]{
{
...
...
}
to
CREATE TABLE{dbo].[t2]{
{
...
...
}
ans then press "Update" button present above...

As explained here, found through "visual studio server explorer rename table", you can't.
There is a workaround: add the tables to a database diagram, rename it there and save it.

(using VS2013)
I came looking on here because I had written the main table for my project this afternoon, and as usual set it's name in T-SQL. But had not realized that the name had not stuck until I went to use it in the Linq-to-SQL I tried over and over to rename it, and I had refreshed many times.
The default name 'Table', has an obvious clash problem in normal code.
Then tonight came on here to see if you guys had found a way and opened the project to try some out.
Turns out that although the original table called 'Table' was still there, I now had many copies of it, one for each attempt at renaming it.
So I think from that we can assume the table renaming problem is a bug rather than a feature, and that MS use a copy first, then should do the deete of the file that is being renamed. But also that the refresh does not work on these copies until the project is closed and then reopened. Yes I know, a bit cheesey, but at least there is a way around.
Personally, with this and the database overwrites at run time, I am starting to lean towards letting the database designer create the scripts for my program to use rather than creating the tables and other database parts. That puts everything back into your hands, which must be a good thing.
I haven't quite got to grips with doing the Linq-to-SQL manually yet, and it is such a bonus to a programmer that I have to tackle that first.

This will help if you accidently put a dang period in your table name
EXEC sp_rename '[dbo].[Vb.Net]','VB'

Just rename the
[dbo][Table] to [dbo][TableName]
press the update button.

Crystal Report not showing correct data

Hi I am designing a report using Crystal Report in VS 2010 C# to show students details.
I have designed the Crystal Report like below.
and my actual database table data is
but I am getting output is
What will be the problem?

Ashok as per your question information there might not be any error in your coding but might have error in Cristal report or Application setting.
Check your both that applications and try again.

It’s not quite clear what the issue you have at the moment. But based on your comments there are few areas that I think can be gone wrong.
Check you have correct data source set up (Right click on student under Database fields and go to set data source location and check you are connected to correct database and table)
Also go to file and check whether you have save data with report option is selected. If it is unselect that option
Try go to database and do verify database
Reason behind you seeing values like ###### is definitely because of not enough space been allocated
Hope this helps

You see the "######" because the field itself is not big enough to display the data. There are two ways you can solve this:
Click on the field to highlight it. Then move the mouse along the frame until the cursor changes to an arrow that points left and right ( <-->). Click and hold the left mouse button and resize the field (just like you would resize a window).
You can right-click on the field, select Format Field, and under the common tab you can check the "Can Grow" option.

DataSet - easy way to create new table?

I use Visual Studio 2010 with C# to write a database application. Until now, I used the guided dialog to add a DataSet to my current project. In the project explorer tree on the right side, a node "mydatabase.xsd" is created.
On the left side, I have the server explorer. From there, I can drag existing tables onto the DataSet-designer to create the references (to my understanding, VS auto-generates code in the background). The references (or TableAdapters etc. respectively) can be used in the source code, in the form of mydatabase.mytable
This is very convenient as I don't have to deal with the details of the connection settings, and it keeps SQL code out of my eyesight.
If, however, I want to create a new table in the existing database, VS does not seem to offer any assistance. I looked at the MSDN-specification. They tell you how to create the table object and the column definitions and how to link it to the DataSet, but not how to actually save it into the database. In all the examples I found on Google, you'd have to explicitly, manually, define a ConnectionString, SQL commands or similar. With all the VS GUI advancements, this seems rather convoluted to me. Is there an easy way to accomplish it?

Open Server Explorer, click Add Data Connection and supply connection information to your database, click OK. Right Click on Tables folder and click Add Table. Add Fields, etc to your new datatable.