Showing Iteration Through A DataGridView, Updating The Dispaly/redraw?
Feb 9, 2012
I have a DataGridView with a single column that currently displays a short list of items. When the user clicks a button to run an update, each row/cell is read and processing begins. I would like to have the selection idicator move down the rows in the DataGridView as it completes processing of each record. How can I display the iteration of the DataGridView rows while the processing is underway? A redraw of the DataGridView or something.This is a VB.net windows form, I know how to do this with AJAX I think, but how can I in a Windows form?
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Jun 19, 2012
I uses datagridview for show query results from database which may have 0 to x number of rows. So I made calculation to calculate size of underlaying form and my datagridview dependable on number of matched rows. Underlying form is transparent and all of that looks like user control what appears and works just fine. But here is one issue: Every time datagrid have to grow, black square in that area is showed before datagrid is filled, what is not nice and surely unwanted. Did datagridview have some mechanism to freeze it and show data when populating is finished?
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
Dim tw As Integer = 0
Dim n As Integer = 0
Dim sqlText As String
Dim reader As OdbcDataReader = Nothing
[Code] .....
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Jun 3, 2011
I am trying to display an error message in the edit section of a ASPxGridView when a user has tried to submit invalid data.I have been looking around and have found one blog that allows me to place an error message in red once it has filed validation by throwing a New InvalidOperationException.
I am using the rowUpdating method as described in the blog, but the exception forces my code to stop the code in visual studio (like you would at a break point) and displays the message. Once I click play again, the code carries on and the program continues. How do I stop the application from stopping once the exception has been called and carry on. ASPxGridView FAQ: How to Enable Editing
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Aug 10, 2009
I need to redraw a button in a button column in a DataGridView. Nothing to complicated other than I do not want the width to be as wide as the column width. To do so I am assuming that I have to create a custom button column object which inherits from the ButtonColum. Then I am assuming that I have to over-ride the Draw of the buttton itself.
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May 13, 2012
VB code: Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[Code]...
I want to display the result of this row a & " " & b in GridView.How should i change the code to make this work properly.
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Feb 1, 2009
Public Class frmStudentScores
Private Sub btnAddStudent_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnAddStudent.Click
[code]....
The Form that I'm trying to get to Display as a Dialog box is AddNewStudent1 but I keep getting an error that says AddNewStudent1 is not defined.
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Apr 22, 2009
[code]...
The Form that I'm trying to get to Display as a Dialog box is AddNewStudent1 but I keep getting an error that says AddNewStudent1 is not defined.
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Nov 15, 2011
i need to calculate age of a person and dispaly it in a label. for example i have a textbox, with these values, 130790, from this number it should generate my age. DDMMYY
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Apr 8, 2009
I want to display in a combobox the names of the fields of a table (table is in SQL server 2005).
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Feb 1, 2011
i can't get the data to be shown in the datagridview what am i doing wrong here? i think the problem starts in the ---- if then statement
[Code].....
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Nov 15, 2011
Unable to display data in datagridview : vb 2010 express + mysql server 5 + odbc connector
1. I am able to connect database successfully. I am using arraylist to set data.& also i m
getting till it set to dataview (Object name )
2. Till now i am not added any column name in datagridview property setting .
[add/remove column]'[code...]
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May 22, 2012
I have looked around quite a bit, and nothing seems to answer my question in particular. I have DataGridView in which I add rows and columns dependent on a certain record count of geospatial data that is held in ArcGIS. The data is then passed through to the gridview for editing. So I do not use any databinding methods, rather it is a very manual process. I store data into a two-dimensional arrays, which indexes are based off of those certain data record counts. After the loops are complete, the data should be stored in each cell dependent on index. The very last row that was populated is populated perfectly, yet the other 72 (or so) rows are blank. Here is the code as follows:
[Code]...
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Mar 7, 2012
Have a unbound Datagridview with first column set as a checkbox and second column just has text.When adding a row the checkbox does not show, what am I doing wrong.Code to add Row:
DataGridView2.Rows.Add(False, FolderBrowserDialog1.SelectedPath)
The code that adds the rows also saves to a file and then there is seperate code to load datagridview at the start of the programme.If I close and reopen programme it displays the checkboxes.
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Apr 16, 2010
Okay I have everything working as it should but when I first start up the data doesn't show up in the datagridview until I enter another record. It seems to be at the End Sub part of the button click Enter Record.This is what I have at form load event.
[Code]...
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Sep 16, 2010
With this project, I created a SQL Server DB with related Dataset and DataTable a while ago with about 10 columnsWith the code below, I fill those columns with values in a new row and add to the datatableThe datatable is bound in a datagridview and all has worked fine until I tried to add a new column to the dataset/table. After adding the new column and rebinding the datagridview to the updated table, the DGV now shows the new column, but the data for that column fails to show up in the DGV.
Dim dt As Date = DateAndTime.Now
If My.Forms.DataGenerator.TextBox4.Text <> "" Then
My.Forms.DataGenerator.TextBox8.Text = dt
[code].....
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Sep 7, 2011
For a class project I'm supposed to write a program that requests a team as input and displays the players from that team in the first column. The players should be sorted alphabetically by their last name, and if they have the same name they should be sorted by first name accordingly. My program compiles and I'm fairly certain that I've done most of it correctly. The second column should be filled with the batting average of the corresponding player from the left column.
My problems are as follows:
1) I can't get the DGV output to show correctly, it posts the player's name with the batting average of that player in the following downward cell.
2) I'm not sure how to further use the .Split method to separate the first and last name after already separating the name from team/at bats/hits, and can't find any info regarding this topic. Also, I can't figure out how to sort in reverse, I've only seen the Ascending and Descending options so far for sorting.
3) Is the way I've figured the batting average the most efficient/correct way, or is there another better way?
[Code]...
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Apr 9, 2011
I'm looking to display some data taken from an Access database. It's just a table of data but all of Visual Basic DataGrid stuff seems too...bland and businessy. I want something that looks really attractive and would be suitable for a game (a sports management one). I'm using some Krypton Controls and even though there is a DataGridView in there, again it's not what I'm looking for. I could just have a listbox for each column of data and that would allow me to customize the style completely, but it would be a bit fiddly working out sorting and stuff (even though I reckon I could do).
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Dec 11, 2010
I am creating one application using visual basic.net and sqlce I have two forms name Form1 and Form2.
I used Form1 to add data to database using OLeDb command I used Form2 to show data in datagridview by using dataset[code]...
Form2 Datagridview show the old data only, it do not show the recently added data by form1. I mean when I build my application datagridview show the data which is already in the database, but it does not show the data which is added by the form1 during run time.
Some one suggested me to fill the datagridview at run time by using OLeDB command. Then I created Form3 to fill the datagridview2 by using OLedb command and datareader and found that Form3 shows the recently(added by Form1 at run time) added data.
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Jun 14, 2010
Is there any way to have a datagridview on a datarepeater with more than 1 row showing?
I have a datagridview on a datarepeater control. The datarepeater and the datagridview are joined on a common field in 1-to-many fashion. The form is designed so that there are 2 rows of the datarepeater visible at any one time. The datagridview is populated in the datarepeater's drawitem event The problem is that it behaves as if there is only one datagridview total rather than one datagridview per row. The drawitem event executes when you scroll to a row. Because 2 rows of the datarepeater are visible, the fill code is executed twice when the form is opened. But the second fill overrides the first one. So you've got this form with 2 different rows but the data in both datagridviews is the same but is right only for the bottom one.
Is there any way to correct this? If I made only 1 row visible, that would eliminate the wrong data. But I want to be able to show more that 1 row at a time.
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Feb 4, 2011
the values in the datagridview column datevalues is showing "February 03, 2011 6:30" but is writing in database "February 03, 2011 6:29:59" .i don't know how to fix this
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Mar 31, 2009
I have a form e.g. Form1 , which displays a datagridview.
1) On form load, the datagridview doesn't have any data
2) The user clicks on a button called filter, this opens a form where the user can specify parameters to filter the data by
3) This form calls a setData() in Form1, which fills the dataset with the data
This works fine. If I click on a button called controlPanel it launches another form and hides this. E.g.
dim cp as new ControlPanel()
this.hide()
cp.show()
On the controlpanel I have a button that links to form1. If I click on it. E.g.
dim frm as new Form1()
this.hide()
frm.show()
It redisplays Form1 but without any data in the datagridview.
I think the problem is that since I am creating a new instance for Form1 it comes up with the blank Form1. Is there a way to redisplay Form1 so that it retains the data that was displayed last, without having to retrieve the data from the database.
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Jan 8, 2010
I've embedded a form into another form by changing the Top Level property. My problem is that the new implementation does not allow me to edit the DataGridView at runtime. Here's the code I'm using from my main form:
Dim f As New form2()
f.TopLevel = False
Me.Controls.Add(f)
f.Show()
f.showRows()
f.showDbvHeader()
When I call the two methods on the onload event in form2 they run OK for the remainder of the event but as soon as it ends, the DGV reverts back to default.
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Mar 10, 2009
Private Sub DataGridView1_CellBeginEdit(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellCancelEventArgs) Handles dgvProduct.CellBeginEdit
ComboBox1.Visible = True
ComboBox1.Select()
ComboBox1.Focus()
ComboBox1.Text = DataGridView1.Item(0, DataGridView1.CurrentRow.Index).Value
End Sub I have a datagridview, all i want to happen is when i click on the cell (on columns(0)) the combo Box will appear (combo box is with item) so i will select the items on list.. after selecting the item it will display on the current datagridview cell. now my problem is when im Begin Edit, the focus should go to the Combo Box in order to select the item by Keyboard and not by mouse..
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Jun 6, 2012
I was thinking of using a dropdownlist showing all names. But is it possible to have a dropdownlist showing a datagridview showing more details such as names, address and telephne number of the person?
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Jan 31, 2011
I have a data grid view bound to a sql server table. What I am trying to do is have changes made in the dgv update in the sql table. I tried to use the Update method of the table adapter but get the following error.[code]....
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Jul 26, 2011
I have a datagridview with a datatable as datasource. If I add a row to the datatable, then the datagridview is not showing the contents.
grdChannel1.DataSource = CreateTable(colChannel)
Private Function CreateTable(ByVal colChannel As MyCollection(Of Channel)) As DataTable
'Create table and add collection into
[code]....
I have 2 row counts if I check the the row counts of the datagridview in the debugging mode.
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Jul 18, 2009
I have a datagridview which i filled with this code:
Dim daProd As New SqlDataAdapter
m dsProd As New DataSet
cmd = New SqlCommand
[code].....
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Dec 16, 2009
i have a DataGridView responsible for showing a bit of data and two of my columns allow for user input using comboboxes.The trouble is that one column only needs to show preset values in it's list, but the other needs to both show the presets and allow for the user to enter in their own values.i accomplish this by showing the editing control for the combobox with this bit of code:
Private Sub DGV_EditingControlShowing(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles DGV.EditingControlShowing
[code].....
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Mar 13, 2009
I am making a project in VB 2008 that has a Form (form1) that allows me to add new records to a database, and another Form (form2) that allows me to search for records in a database. I have done Form1 already, but my problem arrives in Form2 where I have to query the database. This form consists of 1 textbox (txt_search.text), 1 button (btn_search) and 1 datagridview (datagridview1). The name of my database is db_extras_test2003.mdb and the table I want to search records from is tbl_contacts.
I know +/- the SQL sintax to query the database (SELECT * FROM tablename WHERE columnname = (here i dont know if i put the variable name i have set for the txtbox, or the textbox itself)).I want this in a way that I (or other users) type in the textbox, hit the Search button and the results are shown in the datagridview (i can show the results in another way if it is better to do so).I have done the connection to the database already. The code I have so far is the following, but it doesnt work
[Code]...
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Mar 30, 2010
I have a datagridview control on a form that I want to make readonly, before showing the form. I can disable it before showing the form with the [code]...
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