Data Not Displaying On Datagridview
Oct 10, 2011I want my mysql data to be showed on datagridview, i'm doing like this but it's not displaying. [code]....
View 4 RepliesI want my mysql data to be showed on datagridview, i'm doing like this but it's not displaying. [code]....
View 4 RepliesI am using a Data Grid View to display data that come in from a tcp stream. When the stream receives data, the data is parsed and placed at the top of the grid. These are my top 3 lines of the cell clicked event of the Data Grid View.
Code:
If SpotsGrid.CurrentRow.Index = Nothing Then Exit Sub
i = SpotsGrid.CurrentRow.Index
tempFreq = CStr(SpotsGrid.Item(1, i).Value)
I placed the top line there to prevent errors when a user clicks on a blank grid before any data has been placed in the grid and to stop selecting anything if a user clicks on a column header. But my problem is as data is added to the to the top line that line of data is not click-able because the index=0 or Nothing. So my question is what would be the best way to code this so it is protected from the user clicking on a blank grid and the column headers but still allow the user to click on the first line of data?
I'm utilizing the code posted by Jesper Palm here: url...It works great with a PictureBox showing its information. But for some reason I cannot get the DataGridView to display anything when it is in the popup. If I pull the grid out of the popup it displays all of its information fine. If I pause during debug, the grid shows that it has all the data in it. It's just not displaying anything.
View 2 RepliesMy problem is data that load at startup in a DataGridView and a cell containing large data that I want to display on multiple lines instead of horizontalScroll
View 1 RepliesI found a sample of how to display data from a table in to a datagrid using VB.
con.Open()
Dim reader As SqlDataReader = _
cmd.ExecuteReader()
DataGrid1.DataSource = (reader.GetSchemaTable())
reader.Close()
But this just displays the details of the table columns. For example row 1 has details about usrID, row 2 usrTel ect rather than the actual data of the table.
I am displaying data in DataGridView. When I am just adding a record at runtime, the new record gets add, but previous records are getting displayed two times.I tried to remove the rows which are displayed before adding the new row. But then new record is not getting displayed.
View 1 RepliesI've been asked by a local window cleaner to design a small utility that can display a grid of customer data, sort them, and then export it out as a formatted .txt or rtf file.
View 14 RepliesI have 3 tables. customer,item, pricing, each with keys customerid,itemid,priceid. pricing is related to customer and item tables by a 1 to many.pricing (priceid,customerid,itemid,price)
[Code]...
I have recently built an N-Tier app using VB.Net 2008. The application is based on Beth Massi's tutorial at [URL] I am trying to incorporate a datagrridview control on a Parent form - one parent (father and mother) to many children. For example,
[Code]...
I have a DataGridView (dgv) on a Windows form (VB.NET) which is bound to a datatable. One of the bound columns is a an ID (Foreign Key) to another datatable. All I want to do is Hide the ID column and populate an unbound column with the Name (ParmName) for the user. I searched the foreign value in the datatable and retrieved the information. I set the Value of the cell in the Datarow. All works well, but does not display. The cell accepts the value...I can even Debug.Print the values to the console. They are there just nothing displaying in DataGridView. Nothing odd about DataGridView. Should be straight forward...
My Code
,
Dim dtParm As DataTable = MyDataSet.tblParameter
Dim dgv As DataGridView = Me.dgvResultNum_DataGrid
[code]....
I am making futile attempts to get the DataGridView control in a Windows Form to disply several rows of images. The images are all contained on the local disk. The names of the image files (all .JPG or .GIF files) are taken from an XML file. The XML is not the issue, since some of of the images actually appear.
The control has three DataGridViewImageColumn objects. Each column is set up to display a file called Blank.gif which is a transparent GIF containing a single pixel. Later, during the form's Load event, I replace each cell's Value property with the image that the XML file says should be in the column. The XML file contains the name of the file, and I use the System.Drawing.Image.FromFile() method to create the image object from the file name.
The behavior I am experiencing is that that only the very last row of images is properly displayed. The rows above it display the Blank.gif file as if they had never been assigned their intended images. If I change the code so that it will only iterate through three images (one row), all the images show up in the grid. If I then change the code so that six images are processed, only the second row of images is diplayed, and the first row shows only the Blank.gif file's image content. If I change the code to process nine images, the first six show up as blank, and the last three in the final row are properly displayed.
I have lost a considerable amount of my little remaining hair trying to fix this problem to no avail.
The code is as follows:
Imports System.Text
Imports System.Windows.Forms
Imports System.Xml
[Code]....
i manage to display the table but my imgcol that contain image only display a box of x.. in my database column for the image, i put this.
FriedBeehoon.jpg
Imports MySql.Data.MySqlClient
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load[code]........
When in designer, if I add a DataGridView to a windows form, the properties do not show in the properties window. I'm using Visual Studio on XP. The problem exisits even if I create a new project, open a windows form and then drag a DataGridView onto the form.The grid view is present because I can add columns, etc. The only issue is the properties don't display. So I can't rename it from DataGridView1 unless I do it in code.
View 1 RepliesI want it so every time I click an ITEM in the Listbox it displays ALL the data into the textbox. I know there's an easy way using table adapters and binding the listbox, but I'd prefer to do it this way for my project.
So this is what I got.
Lst.DataSource = ds
Lst.DisplayMember = "tblStudent.FirstName"
Lst.ValueMember = "tblStudent.StudentID"
[code]....
It only adds the first rows details to the text box when I click the second record the first rows details are still there.
i have a datagridview which i populate from a SQL database. one of the columns is of a Ntext type. i would like to enlarge the cell on focus so the user would be able to read what's in it without entering edit mode.
View 1 RepliesI have 1000 records in DatagridView. I want to Display only 500 records in datagridview. I will put a button and a TextBox, and Enter 500 in TextBox, It should show 500 Records. How to Do?
View 10 RepliesI've got a DatGridView and using CellClick I have populated a series of textboxes to display a record when user clicks but the most important part, the image wont open in the picture box I get the following message Unable to cast object of type 'System.Byte[]' to type 'System.Drawing.Image I know it must be a cast problem but I can't find anything on the subject
My code:
Private
Sub DataGridView1_CellClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellContentClick
[code]....
Well, just struggeling to decice on which would suit my situation best. I am developing a simple app to show a log of radio messages. Should I display these in a listview or in a datagridview? What is the actual difference?
View 2 RepliesI have couple of questions with datagridview 1.How to handle the Enter-Key when the user edited the columns value.?I mean, without changing the columns values we can suppress the enter-key by following. No problem. It's working Fine.
Private Sub DataGridView1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles DataGridView1.KeyDown
If e.KeyCode = Keys.Enter Then
Dim numCols As Integer = DataGridView1.ColumnCount
Dim numRows As Integer = DataGridView1.RowCount
[code]....
But after if I select any one column & changed the values then if I press <Enter> it's moving to next row. But I want to move it to next column..
2. With Datagridview - I have a column for date. and it's defaut format is mm/dd/yyyy. But Iam looking to read the date by "dd/mm/yyyy" format. Also if the user feed wrong date format then it has to display my Error message. "INVALID DATE"
I'm trying to use the errortext field on a cell to display a validation error. It works fine if I leave the cell, but I can't figure out how to display it while staying in the cell. I have seen examples where the code updates the row's errortext, but I really want to mark the cell in error.
My code is:
Code Block
displaying it into Datagridview while inserting & deleting records in runtime..I insert records it into database using Access and delete but the datagridview not changes or update.my question is how can i update the datagridview while inserting records and deleting records.[code]
View 7 RepliesI had done this by using the query builder (in VS Studio) but soon found out thay I gain no points by doing it this way as I am not using any code. I have tried to adapt the code I had to insert data into my database, just changing the SQL sintaxa and some other bits, but it is not working yet. Well, it gives results, but I think it is still geting the results from the query I had built using the query builder. Here is the code I've got so far:
Public Class Form2
Private Sub btn_search_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_search.Click
Dim str_search As String = txt_search.Text
Dim str_dob As String = txt_dob.Text
[code]....
This is my code for displaying data, but there's always the TIME on my date column
[Code]...
provide a simple example code for displaying a string array of (9x13) values in a datagridview control. I am lost in the complexity of data binding and datagridview controls. I am an experienced VB6 programmer and cannot seem to grasp the transition from flexgrid control to datagridview control.
View 6 RepliesHow i clear all data and not delete data or column in datagridview?
View 1 RepliesI want display data from database in Listbox...Here is my code, It is not working. In Listbox it is displaying as Object[,].Array..
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I would like to know if there's anything that can display data differently than what's stored in the DB.Here's my example. I have a column called Active and in the DB table, 0 represents Active, -1 represents InActive.In my report, when showing whether or not a listing is Active, I'd rather have the words Active and Inactive rather than 0 and -1.
View 3 RepliesIt appears my connection to the db is correct when I select different options the datagrid displays the correct number of records. So I am not sure why I can not see the data in the grid.[code]....
View 4 RepliesCan someone show a beginner how to display data in a chart.I am using VB 2010 and my form displays a datagridview.The Datgridview has 2 fields. Date and numberfield.I would like to show the date along the bottom of a simple bar chart with each number from the numberfield above the relevant date
View 2 RepliesI am working on a program in VB 2008 that will generate a due list. What I need to do is look in a dataset for customers that are due this month and display it in a grid that can be orded by their city. I know how to do a query to that dataset and find the appointments, I do not know how to display the information in a grid from for sorting.
View 3 Replies