how can I get the array of column names from a datagrid. The datagridview is bound to a dataset that contains a datatable.
Example: Columns [A B C D E F G] then you would check the array and see if any values match those
I have multiple datasets that I would like to combine into one. There is a common ID field that can be associated to each row. Calling Merge on the dataset will add additional rows to the dataset, but I would like to combine the additional columns. There are too many fields to do this in one query and therefore would make it unmanageable. Each individual query would be able to handle ordering to ensure the data is placed in the correct row.
For Example lets say I have two queries resulting in two datasets:
SELECT ID, colA, colB
SELECT colC, colD
The resulting dataset would look like
ID colA colB colC colD
1 a b c d
2 e f g h
I am using Visual studio 2008 trial edition and SQL server to make a VB.NET app. I have a windows form which i use to add information to a database, by using a dataset. I recently increased the precision of a column using SQL server manager. I went from numeric(8, 4) to numeric(10, 6). I have my datatable's column set to system.decimal with a maxlength of -1. The problem is when i try and add a row using my program, the column now truncates the values as if it was still set to numeric(8, 4). I have checked my controls to make sure they are not truncating. I am currently creating a row and filling it with values and then adding it to the dataset and then updating the dataset. When i look at the locals during run time the row has the correct truncated value before and after i add it to the dataset but the truncated value is getting added to the database. I have tried manual entering data that is to large for the numeric(8, 4) and the database excepts it. It seem like the dataset does not realize the database has changed.
View 4 Repliesin my VB.Net application I've created a Dataset that call an existing MS SQL Server stored procedure but after the wizard close no columns where added... how can I add all the columns returned by the stored procedure without adding them manually (off course the stored procedure might change in the future) in which case manually will not work.
View 1 RepliesI am running queries using sqlcommand and am trying to get the results from sqldatareader into a dataset table. It works fine when loading the datareader data as a row into the dataset table and writes it to a crystal report.I would like to have depending on the query results have the data in the appropriate columns and it only happens if the results are from all fields.
Dim CommandObj2 As New SqlCommand(sql, cnn)
sqldr = CommandObj2.ExecuteReader()
While sqldr.Read()
Dim dataRow As DataRow = ds.Tables("NTable").NewRow()
[code]....
MsgBox(ds.NTable.Rows.Count, MsgBoxStyle.OkOnly, "Records Count")My dataset and table have the same name, NTable. Question again is how to populate the dataset columns accordingly.
I'm using vb.net / winforms.How can I convert 10 lines with three columns into a DataSet/DataTable?
View 1 Replieswhat i need to do is to get some data from sqlserver and send it to a dataset(no problem there) after i get the dataset filled i need to send the columns and rows to a textfile but i have to separate the columns on the dataset with this "|"
View 2 RepliesI add columns to my dataset but when start my application again columns are not there
[Code]...
I am using dataset in my project.After filling all the tables in dataset,i want to perform join queries on tables.i dont know how to do that...Also i want to fetch few columns in a gridview from dataset table.I can't use ds.tables("student").select(name,roll)....
View 1 RepliesFollowing is the code which gets xml data from web service and then dataset reads using ReadXml method. This Xml has ID and MyDate tags for each table row (so table(0) will have ID and MyDate columns) and this Xml data does not have schema associated with it. When page is loaded first time, it sorts by ID in asc order. It was working until ID was 999. When next ID came as 1000, even in ID asc, 1000 is showing before 999 in datagrid.
I wanted to confirm that when dataset is loaded using ReadXml, all the columns in its table are treated as string even they are numbers or dates and that's why in ID asc order 1000 is coming before 999.
Also, MyDate tag has date in format "01/31/2011" (mm/dd/yyyy) and it seems that sorting is wroking fine for date. Would sorting by date always work even when dataset table MyDate column is of type string (assuming that my above statement is correct)? Are my two above assumptions correct?
stream = New System.IO.StringReader(XML data returned from web service)
With dataset
.ReadXml(stream)
dvView = .Tables(0).DefaultView
[code]...
Dataset's ReadXML() method would read an XML document. But how would we skip certain columns? [Code] So, if I use ReadXML(), it would read the whole document and the dataTable would have "id" column, "name" column and "price" column. But I want to have only "id" and "name" column. How can I skip certain columns from reading it?
View 3 RepliesFor a WinForms VB.Net application, I use the Bindingsource's filtering capacity to filter data, which is seen in a DataGridview. The BindingSource is from a DataSet, created using the Designer, and the data comes from a Access DB, using JetEngine and .Net 3.5. So basically:
Datagridview.Datasource = xxBindingSource
xxBindingsource.Filter = "[extended filter string with multiple columns]"
This filtering works fine, however, now I included some extra columns in the DataGridView, which I'd like to filter on, too. Of course, when I feed the manually added columns to the Filter of the BindingSource, this doesn't work out.I've done some research, and was not able to find any way to use the BindingSource's filtering syntax on the DataGridview. I'd like to use this syntax though, as I designed quite a nice UserControl and class around it, to provide smooth, fast and simple filtering capabilities.
Q:how can i add columns dynamically to rdlc report from dataset in windows based.
View 1 RepliesI am having very odd behaviour from my compiler when i run my program, i have two practically identical snippets of code that are doing pretty much the same thing: both are populating nodes on a treeview using information from the treenode above but when the program runs one of the snippets tells me at runtime that something i have defined is nothing. [code] section and title are columns in a dataset defined by dtName that exists, and the where bit is refering to a column where the entries match the value assigned to volume. which is 1 in the first iteration.
View 2 RepliesI am using a Strongly Typed Dataset as DAL. I want to return a single column from my table for that i wrote the code as
SELECT DISTINCT Floor
FROM Room
WHERE (Building = @Building)
But when i previewed the data, it shows me all the columns of the table with Null Value and the column with primary key has -1 value. This condition raise an Exception when i link this query to a ComboBox ..
cmbFloor.DataSource = da.GetFloorByBuilding(cmbBuilding.Text)
cmbFloor.DisplayMember = "Floor"
Error: Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints.
How can i do a workaround for this? I two databases(.sdf). Database A has table A1 Database B has table A2 Table A1 is an exact duplicate of A2 minus 3 columns My dataset(.xsd) is based off of tableA2 in Database B. I can fill all my tableadapters in Database A and all info in table A1 using the dataset. My problem lies when I do TableAdapter.Update() for Table A1(Since the dataset has the 3 missing fields) it tries to update table A1 with info that isn't there and I get an error. How can I update table A1 and ignore the 3 missing columns using the single dataset? Or is TableAdapter.Update() designed to Update the Database with all columns found in the dataset ?
View 1 RepliesI have some data and would like to add certain columns into a list. So if my data is
[Code]....
Although the code works, im wondering how i could relate the director to the movie with the two list types i have?
I have list of columns in DataTable to be added in list view. I have specified to the listview of columns in the order to appear and Datas as well.[code]
View 1 RepliesI have a program where i let the user dynamically add DataGridViews to the interface, those are also added to a list for easy management. All of the DataGridViews have their own datasources. I am using a Databinding source to get different DataGridViewTextBoxColumns to add.
The problem is the following: When the user adds the first table the following code runs:
dataGridList(dataGridList.Count -1).Clear()
dataGridList(dataGridList.Count -1).Add(NameDataGridViewTextBoxColumn)
No problem there and the right data is displayed, but when the user adds the second table i get an exception thrown:
"Provided column already belongs to the datagrid view"
I think this is strange since i access different DataGridView's right?
The point of all of this is to be able to view different columns in all the DataGridViews depending on the users choices.
I attached a screenshot of my IRIS program and am wanting to implement a new feature, but I'm not sure how to do it. On the left hand side, you can see I have a bound datagridview control that displays a device name and an IP Address from a table in a database.What I want to do is have the option to launch a new form that has ALL the devices visible (including their state: green or red) and based on the size of the form, be able to auto-wrap to a new column.[code]So basically, instead of being able to only see the devices in the DGV on the left as it is scanning, I want to be able to see ALL of the devices in multiple columns in a new form. I looked on codeproject for a custom control to do this, but didn't really find anything.
View 5 RepliesI was just wondering, if I have a list view control, with 2 columns, and insert items to those columns, ex:[code]My GOAL is to NOT use a lot of listviews controls to interact from one col to another. Like a drag and drop function between multiple columns.I have found a lot of examples but they only are between from one listview to another.Have you tried This? I want to do this in vb.net.[code]and some more for the Itemdrag and dragenter events.
View 1 Replieshow do you sort the data by columns in a list view, for example, clicking the title of the column to sort by ascending order.
View 3 RepliesI have a datagridview with its datasource binded to a List(Of T). Now i would like to sort on any of the columns.My code:
'Database access : items = List(BlogPost)
dgBlogPosts.DataSource = items
'My BlogPost Class
Public Class BlogPost
[Code]...
Another noob question from me...one of these days I'll get the hang of this VB!I am importing data from an Access table that has four columns/fields. I have set up the relevant headings etc on the list view control...but I have also set up a 5th column as I want to have that representing the percentage change between columns 3 and 4 (which are numeric).
Here's my code. What I want to know, is that having confused myself with code I've written / adapted from advice given etc where do I put in a forumula to add something to a column in my list view that is a calculation based on two columns imported from the table?
[Code]...
Im wondering how would i display the dropped items directory and icon in columns.
View 3 RepliesHere is my code. clsRules is a class with Get set properties. I have to read data into list and then add to dropdown. There is a reason I am not directly adding dataset into dropdown. That may be part II of the problem.[code]
View 3 RepliesI need to fill a List with data from a DataColumn fetched in dataset. How can I achieve that in 1 step without looping through the entire table in dataset.I want something like this:
Dim lst as List (of Integer) = ds.Tables("Customer_Data").Columns(0)
However the above line is wrong as System.Data.DataColumn cannot be converted to System.Collections.Generic.List(Of Integer)
I need to convert bindiangsource.datasource (which is a list) to dataset or datatable.
View 1 RepliesHow do you convert a DataSet to generic list.I see that in C# you can use .toList(). I'm using .net3.5 vs2008 vb?
View 5 RepliesThis is my code where I send a query to the console; how do I change this to be sent to a list box ?
[Code]....