I have a DataGridView control bound to a DataSet. The DGV loads data based upon a combo box selection. If there are no records in the table that meet the combo box selection then I want the DGV to be cleared.
I've tried:
Me.gdvEXTSigns.datasource = Nothing
This does not clear the existing data (rows, if any) in the GDV.
clearing cell contents within a DataGridView?I have a column with a list of names and would like to be able to make the whole column blank.I can currently achieve this (not the greatest) by clicking on individual cells and doing this ..
DataGridView1.CurrentCell.Value = " "
But rather than doing this I would like to be able to do every cell in the column, all at once. I'll put the code behind a button, so it can all be achieved by a single click.
I creating an EPOS System..I have a datagrid that stores details about all of the items which the user wishes to buy in the transaction.However if the user changes his mind I have a feature that cancels the row in the datagrid.[code]The code functions fine, however a problem arises if I enter a new row into the datagridview, the previous row I recently cancelled appears again.
View 11 RepliesI have a form that contains a datagridview control that is bound to a dataset in design mode. This form contains various other textboxes and combobox controls as well and allows users to create and view Work Orders. It also has a Button control ("New W/O"), that when pressed will clear all values from all the controls on the form. My problem is that it's not removing the rows of data in the dgv. The code that I used to try and clear out the dgv is[code]...
How can I reset the dgv to retain it's default column headers but remove all the rows for the selected W/O?
I use Visual basic 8.0.I have a bound Datagridview.This Datagridview has 25 row.
Only thing i want to clear the row Contents of a specific row.I want not delete of remove the row!
I am new in VB2008. How I can programmtically delete/remove/clear the content of a cell of DataGridView? Say, for example, I have the following code that populates with data in DataGridView. Now,how can I clear/delete the "Test4" text from the cell of DataGridView? The GridView is not bound to any database.
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim dt As New DataTable
dt.Columns.Add("income")
[Code] .....
I believe the following code, which clears/unchecks the checkbox in the "RowSelect" column, actually runs, but it runs VERY slowly. In testing I have approximately 2300 rows in my DataGridView:
Private Sub btnClearAll_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnClearAll.Click
Dim curRowIndex As Integer = 0
Try
dgvWISDataGrid.SuspendLayout()
For curRowIndex = 0 To dgvWISDataGrid.RowCount - 1
[Code] .....
The app appears to "hang" because this loop is taking so much time. When I hit the pause button, it always seems to freeze on the "dgvCell.Value = False" statement and when I hover over it the popup says "Property evaluation failed." Something is taking quite a long time or is interfering with this routine.
When the program automatically clear object, and take them off from the memory? Is it take place when a procedure in which the object was declared ends?
Or should i do it by myself before procedure ends?
I am using combobox on a form to select a graph to display on MSChart. The points are then drawn on the chart which is fine for the first chart selected.If I then select a second chart to display it adds the data to the current graph.I have tried Me.Chart1.Series(0).Points.Clear()which clears the points but the axis information remains ie The first chart has 10 sets of points so the y axis goes to 10. When selecting the next chart which has 15 points the y axis goes to 25 even with the points removed.I have also tried manually setting the x and y max values after the new points are added but it doesnt alter the values.Any idea how to set the chart back to default so that I can plot the next.
View 2 RepliesIm trying to effectively, Save a listviews items to A database (after clearing it) then load it all back in to the listbox, would this do it? becuase it just doubles what ever is in the listbox @ the time,
Dim ConnStr As String = "Provider = Microsoft.Jet.OLEDB.4.0; Data Source = " + System.Windows.Forms.Application.StartupPath + "data.mdb"
Dim DT As New DataTable()
Dim SQLStr As String = "DELETE * FROM [keys]"
[code]....
When you are using the tab to enter a textbox, How do you select all the text so when you begin typing it eliminates the old text?
View 1 RepliesI have written text to a form using DrawString but now want to clear the form and reset the "next" writing position to the top of the form display area. BTW This is NOT a text box!Using Me.ResetText() clears the text from the form but does not move the position back to the top. The next line is written immediately below where the last line was previously displayed!
View 2 RepliesI have three textboxes and a button. The button's role is to clear all the textboxes. This one textbox that I don't want to clear keeps clearing. What do I have to do for this one textbox to not clear up when the clear button is pressed ?
View 2 RepliesHow would I go about clearing IE's history from with VB? I've looked on the internet and couldn't find anything, and I honestly don't have a clue about how to do it.
View 1 RepliesI'm trying to make a game logger for MW2 so you can enter different stats and it will display those stats along with like your overall KDR for those matches and what not.Right now I'm just trying to do one match at a time meaning you enter your kills, assists, and deaths you hit the enter stats button then you hit the display stats button and a bunch of info shows up in the list box. Then you re enter different stats and it gives you the same stats but updates them for that match only. However, for some reason the list box isn't updating. It just keeps adding the kills, assists, and deaths together however the KDR does update.
vb
Public Class Form1 Dim stats As Integer() = New Integer(2) {0, 0, 0} Dim kills As Integer Dim assists As Integer Dim deaths As Integer Dim KillDeath As Double Private Sub btnEnterStats_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnEnterStats.Click kills = txtKills.Text '0 assists = txtAssists.Text '1 deaths =
[code]....
In source code of asp i'm using onClick() in textbox i.e
onClick="openpopup('ct100$contentPlaceHolder$hdpackageid',
'ct100$contentPlaceHolder$txtpackageid','package')"
for opening a popup containing package details.and in its selection in popup packageid is stored into a hiddenfield and packagename is stored into textbox. I need to clear the hidden field and textbox after selection, if I do not need it. I use "this.blur();" for not editing the text box. I need these things to be write in vb code,means in onClick I want to clear textbox, hiddenfield and then call popup.
I am generating crystal reports using sql statements but now i am looking 4 code to allow me to refresh the crystal report. in other words remove the datra on the report and wait for another query
View 1 Repliesis there a way to select a range of cells in a worksheet and clear the data in them?i DO NOT want the WHOLE ROW to be deleted, only a few selected cells (they are all adjacent to each other)and i don't think the ActiveSheet.ranges method works as:
1) the coordinates of the cells in the row to be cleared are determined logically by a VBA sub, i know how to get the coordinates, just dunno how to delete the row
2) this needs to be applied in different areas of the worksheet AND across OTHER worksheets as well.
I'm quite sure I have the logic needed to find the coordinates just need to know how to clear the cells if there is a way to do it that is similar to ActiveSheet.cells ( row, column ) then it would be best from my understanding the ranges method only takes in letter and number formats in strings... i need something that takes in number and number?
Is there a way such that I could reset/clear the values of the controls in my form no matter what type of control they are, can be controls from control suites like Janus and/or ComponentOne?
I am thinking perhaps I could somehow get their base control types?Here is my current implementation but somehow I need to add ElseIf for the other control types.
[Code]...
I want to clear all of the text boxes in a groupbox without hard coding them all. I tried the following snippet, but it also clears all of the form labels which I would like to keep.
For Each TextBox In GroupBox1.Controls
TextBox.Text = ""
Next
So basically my webbrowser has comboboxes and 1 menustrip button(clear all history).
In the menustrip i got History
And In history i got "Show All History"
and "Clear All History"
I turned the "Show All History" into a ComboBox.
And i have another ComboBox for history just like firefox has on its navigation TexTbox.
Lets say the Menutrip ComboBox is ComboBox1 and the other one for the NavigationText is ComboBox3.
What happens is when i press Clear All History They get cleared BUT STAY CLEARED Here are my codes:
[Code]...
How to clear an item from TextBox ?
View 3 RepliesI created a simple calculator. I just graduated with my Bachelors in Software engineerin in March of 2009. I am tryig to get a better understanding of VB.Net. I created a simple practice calculator and would like to know what code needs to be added in the code to clear the output when the user changes the input without adding a clear button as I know how to clear the input and output using a clear button, y working code is pasted below.
[code]
Public Class Calculator 'Form click event handler
Private Sub Add_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles
Download file asynchronous using sockets
I'm having issues with program that uses radio buttons to select between 2 different forms, that are displayed using showDialog. When I click a button to perform calculations in either form, it will act normally and display the information, however when I click the Clear button to begin a new calculation, the form will close, does anyone know why?
View 1 Replies'i using this code in the piicturebox1_paint
myusercolor=(sysytem.drawing.color.black)
myalpha=100
using g as graphics=graphics.fromimage(picturebox1.image)
[Code]....
by this code i have a problem that when i click the clear button the picturebox is cleared.but in the picturebox's mouseover the last drawn picture will appear.so i cant draw a new image ..
I am using VB 2008 (.Net 3.5) and MS Office 2003.Can someone please tell me how can I clear the Office clipboard from within Vb .Net. I read lot of posts on variuos communities and found that till version 2000, Office allowed it. Later MS closed the backdoor.My programming logic expects me to check if Office clipboard is empty before I perform cetain action.
View 3 RepliesI ask age in a textbox and there is a check routine that makes sure it is a number and that number is in a certain range. Later I ask about an illness. There is a logical check to see if you are a certain gender and select an illness that is not possible for that gender.If there is a problem then a msgbox will pop-up and the illness checkbox will clear. The problem is that the textbox for age resets to 0.
View 5 RepliesOption Explicit On
Option Strict On
Public Class formFat
[Code]....
i have discovered a way to clear just errors in text boxes involving =>0 using if statements. if i could use the same and state if <> numeric then etc.
I am filling 8 combo boxes on my form with data from my sql database. The data consist of a first and last name. My issue is after I load the combo boxes and then close the form how do I remove the data from the dataset? I have used the delete but when I do this and reopen the form it gives the followin error "Deleted row information cannot be accessed through the row." If I do not get rid of the data in the dataset, when I reopen the form it will duplicate the data already there.Here is the code that loads the data in the combo boxes:
Dim
DAEmployee As
New
SqlDataAdapter[code]......
I have a problem with clearing my report at runtime.
The code which I execute to create report is as follows....:
CODE: