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by: Ann Morris |
last post by:
INTRODUCTION
One of the most powerful aspects of .NET and Windows Forms is data
binding. Data binding is the process of associating user interface
(UI) elements with a data source to generate a visual representation
of data. Two types of data binding are available for Windows Forms:
Simple Data Binding and Complex Data Binding.
Simple data binding allows you to bind one data element to a control.
In many situations you want to display...
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by: Jason |
last post by:
Here is an odd issue. I am trying to shed some light on why this is causing
a problem.
I have an ArrayList. I am binding it to a ListBox control with has its Sort
property set to True. If the ArrayList only has one element in it everything
works ok. But as soon as I have more than one element, I get the following
exception when the control loads up: "Cannot modify the Items collection
when the DataSource property is set.".
Anybody...
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by: JD Kronicz |
last post by:
Hi .. I have an issue I have been beating my head against
the wall on for some time. I am trying to use late
binding for MS graph so that my end users don't have to
worry about having the right version of the MS Graph type
library. Up until now I have been walking them through
the process of setting the references to include their
version of MS Graph library.
My problem is that I can not seem to get the syntax
correct .. or perhaps...
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by: Brian Conway |
last post by:
I need some help on binding a datareader to a dropdown box. I have included
the code for the dropdown below. It builds with no errors, but returns no
results. Any help would be appreciated.
private void DropDownList1_SelectedIndexChanged(object sender,
System.EventArgs e)
{
OleDbConnection conn = new OleDbConnection("DataSource=ntdrp001.world;
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by: Vigneshwar Pilli via DotNetMonster.com |
last post by:
string connectionString1 = "server=(local); user=sa;password=sa;
database=sonic";
System.Data.SqlClient.SqlConnection dbConnection1 = new
System.Data.SqlClient.SqlConnection(connectionString1);
System.Data.SqlClient.SqlCommand dbCommand1 = new
System.Data.SqlClient.SqlCommand();
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by: JSantora |
last post by:
Essentially, InsertAT is broken!
For the past couple of hours, I've been getting this "Parameter name:
'-2147483550' is not a valid value for 'index'." error.
Apparently, its caused by having manually inserted a row in the table
bound to the Combo box. The InsertAt Method of adding a row just does
not work.
Hope this helps anyone with this problem.
john
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by: amber |
last post by:
Hello,
I have 6 comboboxes, that I thought I could bind to the same datasource, and
have them display different 'selectedvalue's', but apparently I can't...
My code is as follows:
dim drv as datarowview = me.listbox1.selecteditem
dim dtbDL as datatable = _dataset1.Tables(0)
dim dtvDL as new dataview(dtbDL)
dtvDL.RowFilter = "STR_ONE" = 'Matching Text'"
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by: sawpit |
last post by:
Hello,
I have three DataTables linked hierarchically (parent-child-grandchild) and
bound to three data grids as follows:
dsConeSys = ConeSysDataSet.GetTallyDataSet(studyID, assessmentID);
bsTree.DataSource = dsConeSys;
bsTree.DataMember = "Tree";
dgvTree.DataSource = bsTree;
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by: Max |
last post by:
Hello,
I made a windows form with a combo box and 4 text boxes. All 5 objects should get their data from a data set which is populated
in the form load method. The combo box has item ids. When the users selects an item from the combo box I'd like the 4 text boxes to
get populated with the corresponding item information from the same dataset table row that the combo box is pulling it's info from.
Is there an easy way of doing this besides...
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by: dave18 |
last post by:
Hello all!
I found a solution to my original question, but there's still so much I don't understand about it, I thought I'd give this forum a try. At the very least, maybe it will help someone else who got stumped like I did.
It seems so simple... binding a DataGridView to a List<T>. These are the two general problems that I kept running into:
(1) When the data in the list updated, the data on the screen did not update.
(2) When I...
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
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by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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