how to insert data to a datagrid at run time, like values for the columns will be entered in text boxes and after cliking a button it should get inserted in to the data grid and have to be displayed immediately in the grid.
View 16 Repliesi add data in run time i could not see it in datagride till i have to close application and open it, so how can i do a refresh for datagrid just after adding data
View 17 RepliesI have this datagrid containing a couple of items: Attachment 72953 I have a save button which on click will add both the rows to the database table named MSale. The MSale table contains the seven columns present in the datagrid...
View 5 Repliesi'm doing attendance monitoring system. i cant find out how to show datetime in datagrid taht will shows date or time only.
View 10 RepliesHow do i go about adding new labels in run time
Dim Label as new Label
something around those terms
I would like the label to be name label1 ... label 2 ... label3... So on
i have a timer that counts down from 2 hours, its part of a 2 hour time limit for a computer. but if the application was to fail it would restart from 2 hours again. which isnt good, so it needs to restart where it left of. so far i have got it to save the current time on the countdown timer to a reg key. but i need to put that time back hope that made sense. here is the part of my code
Dim LLT As DateTime
Dim HReg1 As Object
HReg1 = CreateObject("Wscript.shell")
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have another problem regarding with time again. After getting a user input time in "H:mm", in what way can I add like an additional 15 minutes to it? Something like this:
1 - User inputs the time in textbox
2 - Adding 15 mins(which is in an array) to the time
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have another problem trying to solve again I am trying to add a line into a listbox in this format time item (10), so, e.g. 4:00 Item1(10) So when the next item is added into the listbox and so on, it will look something like this
4:00 Item1 (10)
4:10 Item2 (15)
4:25 Item3 (20)
The time is a Date, and the minutes to add on is extracted with regex. I was able to add the items like above with hardcoding but ain't successful when i try to do it in a shorter way.
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I have a TabControl on a UserControl. I want the UserControl to behave like a TabControl as usual (it contains only the TabControl and a Contextmenu), including Design-time behavior.I have spent the last two weeks finding out how to add the Design-time behavior and I think I have come a far way.The problem is with adding TabPages during Design-time (while the UserControl is a custom tabcontrol, it is using regular windows forms TabPages).In the Designer class, I have the following code to add a TabPage:
vb.net
Dim dh As IDesignerHost = DirectCast(GetService(GetType(IDesignerHost)), IDesignerHost) If dh IsNot Nothing Then Dim i As Integer = tc.SelectedIndex Dim name As String = GetNewTabName() Dim tab As TabPage = TryCast(dh.CreateComponent(GetType(TabPage), name), TabPage) tab.Text = name tc.Controls.Add(tab)
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So it would add the control to the TabPages collection if it was a TabPage, and use the regular routine otherwise.
(I'm now using 'tc.Controls.Add(tab)' again instead of 'tc.tabCtrl.TabPages.Add')
But, I don't think the designer even gets that far because it is telling me I cannot add TabPages to my usercontrol, because only TabControls can accept TabPages... How can I make my usercontrol understand that it is a TabControl (without Inheriting from a TabControl?)
I am trying to extend the functionality of the ToolStripPanel control (which is a panel hosting ToolStrips that can be moved during design-time, as I'm sure you know).One thing I wanted to add was a 'ToolStrips' property, which would be a collection of ToolStrips the user can edit via the collection editor in the designer. So instead of manually placing ToolStrips on the ToolStripPanel via the toolbox, the user can just use the property to add/remove (or even edit) them. This is of course similar to how you add/remove/edit TabPages in a TabControl.So, I came up with this code, which I have used successfully in the past for other controls:
Public Class cToolStripPanel
Inherits ToolStripPanel
Private _ToolStrips As New ToolStripCollection(Me)[CODE]....
The cToolStripPanel control inherits the ToolStripPanel control and adds the ToolStrips property, which is of type ToolStripCollection. That class, in turn, inherits the Collection(Of ToolStrip). In the InsertItem method, I add the 'item' ToolStrip to the cToolStripPanel. Of course I also need to override the RemoveItem / ClearItems methods but that's for another time.I am 100% sure that this code should works, at least for other controls. If you replace ToolStrip with Button (for example), I can add buttons via the property during design-time just fine, exactly the way I want it.But it seems that ToolStrips are special. When I try to Add a toolstrip (via the collection editor Add button), a null reference exception occurs. I've been trying to debug this all day and I've finally come up with a possible candidate for the problem... (I've actually used design-time debugging for the first time ever, which was pretty cool, and which showed me that the InsertItem method is not run!)
I think the problem is that the collection editor cannot create a new instance of the ToolStrip class. I can remember when trying to inherit from the ToolStrip, I was forced to add a constructor, because the ToolStrip "has more than one constructor that can be called with no arguments".Perhaps this is causing my problem? Do I (and if yes, how?) have to somehow control the creation of a new instance of the ToolStrip? Or am I completely off track and that is not what is causing the problem? I'm sure that it's a problem with the ToolStrip class, since I can use the exact same method with other controls just fine. It's only when I change the type to ToolStrip that it starts getting angry at me....
been racking my brains on this one for a long time, and I've finally decided to ask the question. I had sevaral fields on a vb.net form which need to come together
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I am trying to create what I am sure is a simple program to add hours to convert UTC time. I want to type in a UTC time and have it convert for every state in Australia. [Code] Now that works fine however when the conversion goes past "midnight" it then shows the date and time. I have tried about 50 different things but cannot get it to remove the date when the converted time passes midnight. [Code] The string was not recognized as a valid DateTime. There is an unknown word starting at index 18.
View 8 Replieshow to print a data in datagrid..?
View 6 Repliesi would like to check the possibilities to draw out data from a data grid, which is currently showing out some data in it.the datagrid contains 2 columns in it,but will display only one column at run time. The result is assumed to get changed according to some parameter values.
So i need to query the value of first column and i need to use it as parameter for a report in report viewer.i am trying it in VB.NET.Kindly let me know whether the above is possible? if so please do let me know how to start.
I have a database and I was thinking about using either a List Box or Data Grid to show the data. Is there is another way of showing the data? Also, when the user 'double-clicks' on the data in the List Box or Data Grid then I would like the information to come up in a new form. I know how to show a new form but I don't know how to get the information from the one that has been clicked.
View 12 RepliesI have DataGrid full of data looks like this.
Cell_0 | Cell_1 | Cell_2 | Cell_3
-------------------------------
string | string | string | string
[code].....
How can i limit the user to enter only certain data in a datagrid. Lets say 0 - 9 only. When the user try's to enter any other char, it should stay 0
View 5 RepliesI need to read data from text file to datagrid. I have a datagrid with 3 columns: Column1, Column2, Column3. I have two columns in my text file, eache is separated by double space. I need to make so that column1 from text file goes to column1 into datagrid and colunm2 from text file goes to column3 into datagrid. Column2 in datagrid will be filled with values from OPC server. So i made a simple
Dim mSr As StreamReader = New StreamReader("C:VBpirm.txt")
Dim mLine As String = Nothing
Dim mArray() As String
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I haves textboxes and a ddatagrid and a report. This is how I put the the data of the textboxes in my dataset and show the report, but I was unable to show my data in the datagrid in the report, how can I do? It�s not possible two datasource
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I built the sample project "How Do I" Data Access and ran into a problem adding, updating or deleting records. The project works like a champ until this step... It will let me delete, change or add records just fine, but when I save and close project and go back to my "show table data" in the database explorer nothing has changed?
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I'm working on a mobile project, and I have this:
search textbox (fillby method)
combobox (bound to the data)
datagrid
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I am pulling three coloums of data from a SQL view into my data drid Day,TimeIn,TimeoutI want to colour my datagrid rows red if timeout is null and green if both the timein, timeout have data in them.[code]
View 2 RepliesIs there a way to add rows to a DGV as I want to add information from another form to the DGV. The .Rows.Add() does not work as I am told I can not add rows to a data bound grid.Short of unbinding the DGV and re writing everything, I can not see how to do it.
View 2 Repliesstill having problems with adding (decimal time) to any given time and getting the answer in 24 hours (Military time) I have a picture of what I have at the moment
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I placed a datagrid in my form which l retrive data from my sql. i am using oledb connection. if i run the form i can retrive the data but i am not getting the data in the grid at first ,there is a "+" sign, i have to clik that then it shows the table name and after clicking the table name i can view the data displays in the grid..
View 1 RepliesWell my datagrid so far has the edit,update,cancel feature and it can get info back from database after entering a number into a textbox.
All i need now is to get it to where I enter a number the data comes up which works and I want a blank row to show up which i can edit and add stuff to.
I have linked VB to my sql server and all my tables and data load correctly in VB.I drag and dropped my table in "detail" view and then debugged the program, little did I know, when I tried to add a new instance of data into my table I literally have to enter the primary key. I am trying to figure out how to set the "STU_ID" (PrimaryKey) to auto-increment off of the last row of data on my table.
View 3 RepliesI'm using the 2008 express edition. Now, I created an application that will allow the user to choose transaction in the combobox.text and input its price and quantity using an textbox.text. When the user click button1, it will be push in the datagrid/datable I created. And when the user click the button2, it must be save to excel file. The only thing I need is how to save the data from datagrid/datatable to excel. This is my code.
Imports System.Data
Imports System.Data.SqlClient
Imports Excel = Microsoft.Office.Interop.Excel
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None of the Microsoft videos I have watched, or the other posts I have seen, have given me the pieces I need to understand this process. This is the one key piece of understanding that I need to finish about 4 different programs I have started in the last 2 years. All of them key on understanding the following processes:
View 1 Replieshw i could i/p a string via textbox and display its individual characters into a datagrid view in diff rows...
View 1 Replies