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Wpf: stored procedure with parameter, datagrid and MVVM. ActiveX datagrid in VS How to isenable false datagrid row in WPF. Layout: fixed fluid. Step 10 : In the GridView properties window we can set many of the formatting properties.
Step 11 : Build the project and browse to the Default. View All. Arjun Panwar Updated date Aug 06, Resources Here are some useful resources. NET 4. Next Recommended Reading. Windows 10 Vs Windows Visual Studio Vs Visual Studio Understanding Matplotlib With Examples. Understanding Numpy With Examples. Also, where we would use Select Case in VB, we have to use switch In addition, in VB, we have a capital letter at the beginning of the keywords, whereas in C , they are in all lowercase.
Again, these differences certainly stand out in terms of how they look, but once you write a few statements, you will easily pick up on them. There are many other differences between the languages—I highlighted these examples because they are often used in data-intensive applications. You can get a full list of operators, keywords, and statements in the help that comes with Visual Studio. Also, the Intellisense in Visual Studio is fantastic and can greatly help you, and the error window also gives surprisingly good help, particularly when you are missing a curly brace, semicolon, or an includes statement.
If you are used to working in Microsoft Access, you can get spoiled by things that are done for you automatically. It is pretty straightforward to make a form in Access that will let you add, update, and delete records. In addition, changing the source data for a grid can really be accomplished with one line of code in VBA.
But, building the same functionality from a C application take some work. Even if you get all of the syntax correct, you have to be careful where you declare objects in C , where you initialize them, etc. In addition, we will be using the Northwind Database that comes with Access. Once you do that, you will see the screen shown in Figure You will fill a grid with data, add buttons to filter the data, and have a second grid that will let you choose different tables with which to populate the first grid.
In addition, you will be adding code to allow you to add, update, and delete rows of data. Take a look at the toolbox on the left side of your screen. Take notice of the sections—you will be using controls from the Common Controls and Data sections for this sample. On the form, drag on a datagrid from the Data section, a text box from the Common Controls section, a combo box from the Common Controls section, two buttons from the Common Controls section, and a second datagrid from the Data section.
When you add the datagrid, you will get the popup dialog shown in Figure For the first datagrid, leave the boxes checked to add, update, and delete records. For the second datagrid, uncheck those boxes. On both, leave the datasource as None. You can create a project datasource and use it here, but we are going to start with programming the datasource because it will give you more flexibility. If you pressed F5 to start the project, it would open up and nothing would function yet.
Next, you will need to put in some code to get the controls functioning. Once there, you will see the lines of code shown in Example prefilled for you. These lines of code are very similar to adding a reference in VBA. When you add a using directive, it turns on the Intellisense for the objects, properties, and methods related to that namespace.
There is an additional using directive that you will need to add for this example to work. Right under using System. Data; , add the following line of code:. This line of code tells C to use the. You will use objects, properties, and methods in this namespace to connect to the datasource. Also, you need some of the variables and objects that you are using to remain available continuously while the form is open.
For this reason, you need to declare those at the class level and not in the individual procedures that you will be writing. Add the necessary lines to have your code read as shown in Example After the Initialize Component ; statement, add the following lines of code:.
The connection string is very similar to what you would see in VBA. The query variable is a string that defines the Select statement that you are using to access the data. The OleDbDataAdapter is the class that holds the data commands and connection that you will use to fill the DataTable.
The OleDb CommandBuilder class generates the commands that reconcile changes that happen in a DataTable and the connected database. Since you are connecting to the Northwind Database, you need the QuotePrefix and QuoteSuffix properties defined with the square brackets. This is because the Northwind Database has spaces in the field names. If you try to update a cell in your datagrid that has spaces in field names without these properties defined, you will get an error. You can always trap that error, but it would make updating impossible in tables with spaces in field names.
However, I recommend always adding these lines just in case. Next, add the following lines of code to finish up this first procedure:. You are accomplishing several things with this code. First, you are filling the Data Table with the data in the data adapter.
Then, you are creating a binding source for the form. The BindingSource class is part of the System. Forms namespace. Then, you are finally ready to set the datasource for the datagrid. Once you do this, the data you selected will populate the grid. The next part of the code is a for loop, which is being used to populate the combo box with the field names.
It is being included here simply to show you an example of how to iterate through the columns of a datagrid. Finally, the bottom section of that code snippet is being used to populate the second datagrid with the schema of the OleDbConnection.
If you press F5 at this point, the form will open and you will see the screen in Figure Because you told the first datagrid that it could add, update, and delete, you will be able to edit those fields.
So, you can edit the field and everything will show on the screen like it is changed; however, if you close the form and open it again, the changes will not be in the database. Also, you will notice that the bottom datagrid cannot be edited.
This is because you unchecked the boxes. The important thing to note here is that those settings only impact the grid; they do not impact the database. Add this code right below the curly brace ending the Form1 procedure:. Once you do this, you need to set up the grid to call this procedure.
On that box, click on the lightning bolt to get to the events and find the event called Row Validated. It should be the only item available in the list at this time. When you are creating an application, the last thing you want to do is have your users get dropped to a debug window or throw an unhandled exception.
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