I have a form with a Data Grid View for personnel assigned to a project. I currently have a singular drop down that allows you to add people to the project which pulls all names of people based on a main roster. I figured out how to do this by editing the columns properties and using DisplayMember however, it only allows for one column selection and not an expression.
We have only a couple of people with the same last name however, it's caused headaches in the past. I want the drop down to pull in last name, first name. I've read a few things like using an expression property but haven't be able to find that. It seems a bit different than other posts I've read mainly because Visual Studio created Binding Sources and Table Adapters and I can't seem to edit this individual control column. Everything I've read shows how to do this by programatically creating a table but not by editing an existing one. I have an SQL view set up that solves this but am unable to set the control to a view or another query. So what's the best way to edit the adapter without creating the column on the actual table?
Thanks for any help.
Don
Followed this but wasn't able to get it to work with the DataGridView and adpaters.
https://learn.microsoft.com/en-us/dotnet/api/system.data.datacolumn.expression?redirectedfrom=MSDN&view=netframework-4.7.2#System_Data_DataColumn_Expression
This hasn't really got anything to do with the grid or the table adapter, so that would explain why you can't find it. Expression is a property of a DataColumn, i.e. a column in a DataTable, so that's where you need to make the change. If you have a typed DataSet then you make changes to it in the DataSet designer.
Open your DataSet in the designer. Right-click the appropriate table and select Add -> Column. Enter the name of the column in the table, then open the Properties window and set the Expression property. I just tested with a Person table with GivenName and FamilyName columns, adding a FullName column and setting the Expression to GivenName + ' ' + FamilyName. Once you save that, you can see in the Data Sources window that your table now has the extra column. If you drag that table onto a form, it will create a DataGridView with a corresponding column. If you already have a DataGridView then you can add a new column yourself and set its DataPropertyName so it binds to your new expression column.
Related
In our database, User Defined Fields in the Production Order rows define linked Production Orders and Purchase Orders. The columns for these fields on the Production Order window really should have golden link arrows.
If I created the columns myself, I would set the LinkedObjectType properly and the arrows would appear. However, in this case the B1 client creates the columns automatically. I need to get them and add the link arrows after form creation has completed.
The Production Order items grid is a Matrix, which offers the Columns property, so I can retrieve any column I want; however, it is returned as a plain Column object, not an EditTextColumn, so the LinkedObjectType property I need to set is not available. Attempting to cast the Column to an EditTextColumn simply causes an exception.
What is the correct way to add link arrows to a UDF column on the Production Order screen's matrix?
You can update user defied field and set Validation to Linked to entities.
In simpler terms: How do I reference only the child table rows in a XAML view that refer to a parent ID?
I know how to use a DataSet adapter to populate it from a database table and create a listview/treeview/etc. with it. Now, I have added a new table that its main ID column is linked with a Relation to the parent table's ID. How can I make a view in XAML that is populated only by the children of that new table according to one ID on the parent table and not by all the entries of the child table?
The way I use the main table now is simply:
Assign table adapter
Fill() the DataSet with the table
Fill a DataGrid (for instance) with a simple viewsource that references Source="{Binding Path=The_Main_Table, Source={StaticResource dataSet1}}"
So the question is, now that I have a child table connected with a Relation (connecting an ID column between the two), how to populate a DataGrid for instance ONLY with the child rows that refer to a selected row on the Parent table? The selection of the Parent row has already been done and a reference to it can be done either with XAML or code-behind.
OK, the answer I will provide (for my own question), is not very technically detailed by I believe it will be great help for other beginners on this. Basically what you do is that you open the Data Sources window, then you find the table that acts as a Parent, scroll down and find the entry that represents the Related table and simply drag-and-drop it onto a XAML Designer container which will provide a good example usage for that kind of data binding because it will automatically create a GridView (or ListView etc. depended on choice).
An image from the official documentation Display related data in WPF applications:
From: https://learn.microsoft.com/en-us/visualstudio/data-tools/display-related-data-in-wpf-applications
Now, that is not enough for it to automatically switch to the Parent's selected row, however you will notice that one of the entries might be already restricted properly.
Only thing you have to do now is to use methods such
as
myParentTableViewSource.View.MoveCurrentToPosition(i);
And the view based on the Parent ViewSource will automatically change.
Behind the scenes:
The basic reason this works is that instead of using as a source the entire dataset, the view binds directly to the Relation and the source of it is the Parent table's viewsource..
Just read how the drag and dropped element is coded and you'll be set.
From time to time, I need to create an input control which allows multiple rows of input, the type of input and number of columns could be different in each case but typically it would be represent a database table being edited, so it should also be possible to store an id value within each row. It should also be possible for the user to add new rows to the input if they have more data to input.
I have tried a couple of approaches to this but they are all very long winded for what seems like such an obvious and common scenario. I'm thinking that there must be a simple way to do this that I have missed.
The way that I usually solve this is by using a list view, enter all of the input controls required within the item template and use a html table for formatting, with each item being a row of the table. If there is existing data to be edited, I would load the data from the database, add a blank object to the results and bind it to the list view. If there is no existing data, I would create a collection with a blank record in it and bind it to the list view. I add a button for adding a new row. When clicked, this button retrieves all of the existing data from the list view by iterating all of the listview items and populating the data into a collection, which I would then add a blank object to and rebind the listview with the results. When saving, I would retrieve the results by iterating the listview items again and using a hidden field within each row to store the record id. This would determine whether a new record was added or an existing record was edited.
This approach works for me but I'm sure there must be simpler ways to achieve this. Looking forward to seeing how other people solve this.
For web forms, use a GridView. You can set its properties to allow editing, deleting, new rows, sorting, and paging.
Check out the MSDN example here that shows how to use it. If you bind a datasource to it, it will figure out the columns and adjust dynamically then, or you can predefine the columns you want for more customability.
You are talking about bulk insert/update. You could use XML insertion/updation for this purpose. Get all the data to a DataSet ds variable. Then use ds.GetXml() method to convert the dataset to XML string. Pass this to an XML parameter into SQL server which has the datatype 'XML'
INSERT INTO YOURTABLE
SELECT
V.VOI.value('(.)[1]', 'int')
FROM
#Input.nodes('/DATASETNAME/DATATABLENAME/') V(VOI)
Use this link to learn more
You need dynamic table with Add, View,Edit and delete operations on each data.
I would suggest using DataTable Jquery component. there are tons of examples on Data operations, and you can plug this with any Server technology including ASP.net
http://editor.datatables.net/
I am new to windows desktop application development.
I want to generate a bill report that is the bill master details should be displayed once and the related items should be displayed in the tabular format.
I have created the data table in dataset. The data table is configured.
Now in the report design I am not able to see this table to drag the field to their proper position.
Please help how to do so.
Thanks in advance.
Adding datasets
First you have to add a Data Source in your Report. You can do this by using the Data Sources window in VS. Click the Add new data source and select what you want (I usually use object). In the Report Data window there is a folder 'Datasets'. If you right-click it you can add a dataset.
Data in a table
To visualize the dataset you can drag a Table from your Toolbox onto the report, select it, then right-click on the upper-left corner and select Tablix Properties. There you can bind a Dataset to the table. Choose which items you want to display in which column by clicking on the column and selecting a value.
Singular data (textbox)
You can set an expression on a textbox that retrieves a specific set of data from a dataset (you can also use this on table columns btw). You can do this by right-clicking the textbox en going to Expression. This will open up an Expression window that contains some sort of expression builder.
The expression I use to retrieve singular data is the following (not sure if this is the best approach but it's the only one I know):
First(Fields!MyField.Value, "MyDatasetName")
Basically I'm assuming there is only one row in my dataset (or that field is the same in all rows) so I'm just retrieving the first value.
I have a DataGridView in a C# WinForms app that is DataBound at runtime (through Form_Load) to a custom Object.
In the design view of the DataGridView I have no columns set up.
When the Form loads the the columns are automatically created based on the data in the Custom object that it is DataBound to.
My question is how can I control the the Columns that are automatically created.
For example if I want one of the columns to be a DataGridViewLinkColumn instead of the DataGridViewTextBoxColumn that is automatically created?
The default columns are based on the data-type. I haven't checked, but for a link you could try exposing the data as Uri, but that might be hopeful. Really, if you want a specific type of column - add the columns through code and set DataGridView.AutoGenerateColumns to false.
As Andrew implies; normally something like reflection is used to generate the columns, and you'll get a column for every (browsable + public + readable) property. There is a layer of abstraction on top of this if you need, but this won't help with adding a hyperlink column.
You can pre-create your columns in the designer. If the name of the column matches the name of the property the column will end up bound to, the databinding will take care of the DGV population for you as before.