I am using VS 2008, asp.net and VB coding.Using Grid View, How can I access the data of the selected row if the column type is check box?The following line is working fine with text, date, number,lbltest.Text = GridViewRVs.SelectedRow.Cells(7).Text but the problem is that I need to access a checkbox..
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For each column in data table i want to add parameter with same data type as column data type. But looks it's not that simple.
Dim cmd As New SqlCommand
Dim dType As New System.Data.SqlDbType
For Each cl As DataColumn In DataTable1.Columns
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How can I do this?
I am writing a macro using excel 2003 to read rows of a excel sheet & perform some task,now before execution I want the user to select for which rows the operation is to be performedo do so I added a form in MACRO & placed a flexgrid on the form which will display the content of the excel sheet. But, I am not able to change a column type to a checkbox where the user can check it to indicate if the operation is to be performed on that row or not.
View 2 RepliesI have a number of controls (Device1, Device2, etc.) that all inherit from BaseDeviceControl. In the DragEnter event handler I am trying to test for the correct type by using the BaseDevvceControl like this....
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I'v designed a ms access database table with one field having Datetime datatype. I can Insert data into it from vb.net front end by trns_dt DateTime.Now.DateBut when I fetch records from the tableand assign the dataset datasource as da, it shows datatype mismatch error.
daleDbDataAdapter("SelectDaily_Transactiondtp_from_dt.value dtp_To.value con)
dsDataSet
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This is my programs complete code, the only problem is i want to fix the amount of decimal places that show up in my gridview. The problem is if i do this on the asp side the location of the column gets thrown off and the column is duplicated. I figured if i just remade the table on the asp side it would work only problem is if i remove the sql for that particular column the asp side column cannot get data.
Imports System.Data.Sql
Imports System.Data.SqlClient
Imports System.Data
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How can I get information what data type a certain column is. (Integer, string, memo,...)
View 1 RepliesHow could you, update the fields on database if its data type is Y/N, and the method of updating is a checkbox??
View 1 RepliesBasically, I want to get the column data from a selected row in a ListView (non-MultiSelect).how to do it if it's just the first column (lvw.SelectedItems(0).Text) but how do I get the data from the other columns?
View 2 RepliesI'm somewhat of a novice at VB.I have a DataGrid that I am manually populating from a SQL query-based dataset (see code below). Question: How do a capture the value of a specific column of the selected row (mouse click in the row) to use as a variable in other parts of the overall solution?Also, how do I add cell padding around the contents of the data grid cells?
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The user enters information into a textbox and I would like to reflect these changes on the database. So say there is a value of 50 in the textbox and the user just deletes this and it is now "". When I try to update the database I receive an error as it expects a type of double. However, simple appending a 0 here when a value of "" is encountered will not work for me as I have a universal function to handle all of my updating needs. How would I go about determining the type of field I am dealing with (int, double, varchar) of the data table which I currently have in memory
View 3 Replies<VB.NET 2005+SQL server 2005>
Error has to be raised for input text by user. User will input data on datagridview. Below are examples of use input.
1. "2009/01/23 08:00:10" --> How do I know that right datatime format or not
2. "2009/15/23 08:00:10" --> How do I check the month is wrong
In my datagridview there are two dependent columns, one is category and the other is items. So I want to filter my item column list as per selected category. But the problem is that when I change the category wise data to datasource of items combobox, previous selected items names disappear because previous items is not in current datasource.
View 1 RepliesI have a dataset and want to know the data type of a specific column. The GetType returns datacolumn not string or integer etc.iggy!
View 2 RepliesI am writing validation for a datagridview which may open a number of different tables (dependant on what the user selects). The idea is that the user will select a lookup table to edit or add too, the datagridview opens (via a binding source) and populates itself with a specific table's data.
The user can then edit the data in the rows and when they are happy update the dataset which in turn updates the database table.
This all works except there is no validation per say prior to the update. As the datagrid loads a different table dynamically I cannot predetermine table column names (without writing a mass of hard coded values) so I would rather go by the datatype of the column since the tables all follow a similar format.[code]...
I need to read data from an Excel sheet as part of a data conversion. Certain columns contain mostly numeric data but may contain some alphanumeric data somewhere in the excel sheet. The problem is, my conversion sees the alphanumeric values as null (or blank. Using the .ToString() method returns ""). To connect to Excel, I'm creating an oledb connection, creating an OleDbDataAdapter, then filling a DataSet with the adapter.
Here's the VB code for connecting:
private _oleadpt As OleDbDataAdapter
private _oleconnection As New OleDbConnection
Dim olecomm As OleDbCommand
'_database comes from a settings file and is the full path to an excel document
Dim connstring As String = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" & _database & ";
Extended Properties=""Excel 8.0;HDR=YES;"""
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I think the data adapter is determining the datatype for the columns based on the first however-many rows it looks at. It decides the columns with numbers are numeric which is the start of my problem. Changing the formatting of the column in Excel doesn't seem to affect the datatypes in my data set. Is there a way to tell the dataadapter or dataset what type of data to use for a column? Or should I try to cast the data in my SQL statement?
i am having this problem for quite some time now and cannot figure out the solution..
i have a productid that i get as a result of sql query. The data type of productid in database is int
Dim scheduleid As Integer
cmd.CommandText = "Insert into DeploymentSchedules (scheduleName) values('Schedule');select Scope_Identity();"
scheduleid = cmd.ExecuteScalar()
Now when i want to insert it into another table .
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I usually have a check to see if a certain database column is DBNull and if it is convert it. Current with a datatype of money in SQL 2008 with the row column containing
Null, i declare the equivalent value as Decimal (in .Net) then get the error "'DBNull' to type 'Decimal' is not valid".... How could i check this column for null and convert it?
I want Too Know how Can i Fill THat values in the sql Column my Sql Data type is Integer Can i fill any SIGN Valuse like (122,123)(123+123)(321-123)(485;456)(301>908) in these Values Can i use any one in sql column and the column data type is Integer.
View 6 RepliesHow i can change data grid view column type runtime. like i want to make a coloumn checkbox but runtime.
View 8 RepliesI have a table named fec in which i hv column named EndDt having Date/Time Data type.Now i want to display those records in my report which have EndDt less than Date i pick from DateTimePicker and month is current month.Private Sub DtpDefault_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles DtpDefault.ValueChanged
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Lets say I have a form with several Textboxes that are all bound to "bindingsource1". I'd like to be able to check the field data type each textbox is bound to. Something like this,
Dim ctl As Control
For Each ctl In frm.Controls
If ctl.GetType.IsAssignableFrom(GetType(TextBox)) Then
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i would like to ask how do I subtract a value from my column Quantity(data type is integer = 18) in my inventory table if a customer will want to have 2 orders and of course 18 - 2 will be 16. how will i do this?
View 17 RepliesI am trying to add data to a access datatable column I am using a richttextbox to fill in any data but when i save it to a column in a database and if there are more chars then 255 then i get an error (try to enter more then column lenght) anything under 255 is working fine the column in access = type of 'MEMO' so no limited to 255 it's the hystory to send that is giving me the problem
Dim history_to_send As String
Dim day_to_send As Date
Dim ID_to_send As Integer
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In my Windows Form I have a ComboBox that is filled by a Stored Procedure with a list of names. I have the Combobox set for AutoComplete to "Suggest" and From "ListItems". When a user starts to type in and the AutoComplete does not find any matches in the listitems the user can tab out of the ComboBox and leave what they typed in the combobox even though it is not one of the Valid Items. Is there a way to check the Comboxbox to make sure of of the selected Items has been selected?
View 3 RepliesI am trying to read some data from an Excel 8.0 worksheet using OLEDB thusly:(Warning - contains curly braces)
Code:
DbProviderFactory factory = DbProviderFactories.GetFactory("System.Data.OleDb");
using (DbConnection connection = factory.CreateConnection())
{
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The problem is that for some columns it sets the data type to be Double even though the spreadsheet column format is "Text" and teh column contains non-numeric data. Then when it gets to that cell it returns DBNull instead of the text value.
I have already binded a data source from Access to my visual basic program but need to add a True/False column to two of the tables. I could do this manually in access and re-bind the sources but that would take up too much of my time so I wanted to know if I'm using the proper code to add a column to the data table directly from VB? Here is the code I want to try but I don't know where to place it?
OleDbCommand = OleDbCommand("ALTER TABLE tableName ADD
FieldName DataType");
(something).Connection = OleDbConnection;
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I'm not sure what goes into the "something" parenthesis and where this code must go. I already tried editting through the data designer but although it shows the column in the DataGridView, it does not save any data or the column into the actual access file.
I have a form with a data connection to my access database that shows my music collection, Artist,title,year,chart position, media location & filename.It is set to show only artist & title I have a list box that i can manually load files into to create a wmp playlist i would like to be able to do one or both of the following:
1. drag and drop data from my dataset to the list box to provide a playlist
2. create a playlist from this database that will auto play
I would like a listbox which use 2 fields for 1 Column, how do i insert this in a query?
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i try to update the table but not sucessful. In access database the following fields with datatype as under;
Parameters=text
Value=Number
Units=text
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