How to reset the MSCHart values - c#

I have a combo-box which contains different names of files and every time i select a value the respective file should be read and respective graphs should be generated. Now as i select the first file the charts are drawn correctly but if i select another value from the combo-box then the charts instead of re-plotting the charts values are added to the existing values..
I tried using serializer but that doesn't seem to work...neither i am able to find a solution anywhere.
Just need to know what i need to add as to reset the existing chart to default value and redraw on every combo-box selection.

You'll need to clear the values from each of your Series.
chart.Series["MySeries"].Points.Clear();

foreach (var series in chart2.Series)
{
series.Points.Clear();
}

Related

Display each record in different pages on a textbox in rdlc report

I want to display data-set record in different pages . i am using rdlc reporting in c# win form.
in rdlc design i am using text-box which show only single data.
i want to display all data but in separate separate pages.
actually i am printing multiple cards in bulk , it should be in different pages so i am unable to do.
kindly help me.
I already try page-break in rdlc report but its not working
this.sp_bulkprintTableAdapter.Fill(this.db_ShopDataSet10.sp_bulkprint, date1, date2, Convert.ToInt32(catname));
See the image here to understand what i want. i want to print this type of cards in bulk from database using simple select query. what i am facing problem is textbox is not showing multiple records and each record on different page.
i have done with it by performing following steps
1) add table in rdlc report
2) remove header row and two default columns remaining single row and single column.
3)enlarge the table
4)remove the default textbox in table
5)add rectangle --- add page break here
6) add textboxes. (multiple).
Now each row of my data is printing on different page.
Make sure that your page size is correct.
I found that I could just drop a List (Toolbox: Report Items -> List) component on the page. Stretch it to fill the area you desire and drag fields into appropriate locations. Works great for making individual labels for each data row.
Net 6 mvc web project using Microsoft.Reporting.NETCore.

How do I set the content of a label to a database table cell in WPF?

I have built a program in WPF using Visual Basic that allows users to select from a series of items. The list of items may change as I add more items or remove older ones. Originally, I would just add and remove these items in the project code, and rebuild the executable.
Over time, however, the list of items grew and became tedious and impractical to maintain in the code. It occurred to me that it would be easier to store the items in a database table which the program can read, and the list can just be updated by adding and removing items from this database.
I have the database built, and I've added it as a Data Source. I have the data connection set up and everything is ready to go.
What I need to know is how to set the Content property of a label to a cell from a table in the database. I want to do this in the codebehind, not in markup (XAML).
My guess is that I will need to set up a sort of query with a for loop to find the cell I want.
The name of the database is ItemsDB. It contains a table called ItemsTable, and the fields in the table have a unique ID (key) with an AutoNumber data type. The column containing the data I want is named ItemLabel.
So, to sum it all up, I want a label to show the content from a single cell in the database, specified in the codebehind. Either C# or VB is fine.
EDIT
I guess I should've mentioned that the labels themselves actually function as buttons, and I don't really want to display a ListView if I don't have to. I know it's not helpful to not have any code posted, but I don't even know where to start, so there's no code to post.
Took a while longer than I expected, hope this is still useful. So, what you want to do is iterate through a collection and create a new Label for each row.
You will need a container for the Labels, I used WrapPanel, but you can use any Panel you want. I'm replacing your Data Source with a simple DataTable, you'll get the point from this:
foreach (DataRow row in YourItemsTable.Rows)
{
Label newLabel = new Label();
newLabel.Content = row["ItemLabel"].ToString();
// If you need some events, attach the handlers here
yourParentContainerPanel.Children.Add(newLabel);
}
This should be all you need.

How to generate freeform rdlc reports with one page per row

Given a data set containing multiple rows, from within a .NET console application I need to generate a report on a single page for each row, sending those pages directly to the printer.
I am attempting to use Microsoft Report for this by attaching it to a data set and placing TextBoxes where I wish. Generating the report and sending it to the printer are not a problem. Unfortunately, the data only seems to be available in aggregates -- First, Sum, Last, Max, etc. I cannot latch the text box to a bare field.
Some poking around here and other sites seems to address this, but only when the data is presented in a table. One post even said without elaboration, "My mistake was using Text Boxes"
Am I using the wrong tool for what I am attempting to accomplish?
I ran into the same problem and managed to solve it. The solution seems a little convoluted to me so don't quote me on the "right" way to do this, but here is what I did:
Make sure you have a Dataset defined for your report.
Add a "Table" control to the report. This seems to be needed in order to iterate the rows in your Dataset.
Delete the header row and two of the default columns from the table so that you are left with a single row with a single column.
Expand the table to the width of your layout and make it as tall as you will need for your "free form" layout.
By default, there is a TextBox inside the table cell. Right-click the empty table cell and choose "delete" to remove that TextBox.
Drag a "Rectangle" control into the empty table cell. It seems to automatically "dock" to the width/height of the table cell.
Now you should be able to drag the fields from your DataSet (TextBoxes, etc) into the Rectangle to produce the desired layout.
Note that I am in the early stages of using this approach so I'm not sure if I am going to hit any walls... but for a basic report that uses TextBoxes and a page break after each "row" it seems to be working ok.
Or you try to use a list.
In the list you can arange textboxes (and other controls) as you want and they will be filled for each record in the recordset.
This work for me. :-)

Showing records on grid efficiently

i have a third component grid that i am using on my page.
It displays 20 records in one page.
Also i am using images to display certain columns.
Like comments , attachements have clickable images for every row.
the problem is.. everytime i load my page.. the logic right now is.. it goes in the database.. checks for every row in the table to see if the comments are added or is there attachment.. and accordingly disables or enable the image of that particular record(row)
Now this takes too many database hits and processing time increases.
Can u tell me any other way to do this.?
You could add a column "Number of comments" and "Number of attachments" to your rows.
You should enable some sort of VirtualMode in your grid ( every grid should have this function in some way ) in order to feed just the item the user actually see. This is a good practice always.
Irrespective of grid, you can build some sort of object which collectively holds the textual information that you need to show and some more flags which tell you about the image and attachment. You bind the collection of this custom object to your grid.
Use the flags in this object to put different images in your columns.
HTH

Inserting new row in gridview using an external Add button and a list as data source

I have a grid with three columns, two of which contain drop-downs, all of them getting filled from a web service result set. Now I want to allow the functionality of adding a new record in the grid by clicking an Add button present outside the gridview.
Whenever the user clicks the Add button, a new record should be created in the grid with value list filled in the drop-downs with the available options.
What is the best possible way to achieve this considering extensibility in mind.
Thanks a lot!
P.S. The data source set for the grid is a list.
Add a blank item to the list, and rebind with this new list and dummy item. That's typically one way to do it, or store the insert form in the footer of the columns. I've used that approach.

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