Date Conversion - Retrieve And Display Data
Jun 3, 2012
I am trying to retrieve and display data from MySQL database to vb.net console window using the following code
myconnection = New MySqlConnection("Server=localhost;username=root;password=;database=agro-system;")
myconnection.Open()
cmd1 = New MySqlCommand("select * from sales", myconnection)
myreader = cmd1.ExecuteReader()
While myreader.Read()
[Code] .....
But I get the following error:
Unable to convert MySQL date/time value to System.DateTime
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Apr 8, 2010
Title pretty much says it all. How do I format the date of a dateandtimepicker to insert it into the SQL date datatype?
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Dec 26, 2011
I do encounter interest problem when I am using VBNet2008 and SQL Server 2000. I am developing Window Application and one of the form I am using SQL String with Date between to retrieve specific data from SQL SERVER 2000 Table and it's not working and generated this error message:
Invalid column name strFromDate
Invalid column name strToDate
Here are the overall coding:
Dim sqlconn As SqlConnection
Dim sqlcmd As SqlCommand
Dim DA As SqlDataAdapter
Dim DR As SqlDataReader
[Code] .....
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Jul 18, 2010
i want to retrieve data and display it into textbox
im using mysql
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Feb 4, 2009
i need to create one search box using textbox and the result will display on listbox.
I have textbox1 as inputbox, button1 as search button , listbox1 to display the value , Database1.mdb as my database.
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Dec 8, 2009
The main problem is I couldn't display the result when I retrieve data from database.
1. On Picture 1 above, for the Dg_Details, I set the Columns in two type, textbox and checkbox. But, for the datagridview1, I didn't set anything.So, when I bind data from database to Dg_Details and datagridview1, the datagridview1 display the data from database, but the Dg_Details doesn't display the data. Below is the code I written in my form :
Try
objCommand = Me.MyConnection_F.open.CreateCommand
objCommand.CommandText = "select Reg_Num, Reg, Golf, Course_1, Course_2, Course_3, Course_4, Course_5 from Invoice_Reg where Receipt_No = '00001'"[code].....
I think that's happen because the Dg_Details already set and it blocked the result data from database.
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Mar 7, 2010
Note: Combobox contains company name, then when i select one of the company in the list, the information on the table connected to to the company table like purchase order table info will appear on the datagridview.
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Jul 26, 2010
I did populate data from db into the combo box and display it into the text field .
Below is my code :
Imports System.Data.SqlClient
Public Class MPEJobEntry
'declaration of connection string
[code]....
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Sep 3, 2010
I am trying to retrieve information from one row that has four columns(name,company,address,phone) so that once it is displayed in 4 different textboxes, I can transfer to a word document.
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Sep 20, 2010
how i can use stored procedures with parameters to retrieve data and display it in a report viewer in VB 2005.
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Jan 16, 2012
how I can ensure that conversion of a date to a string and a string to a date will give me the same date format.
For example:
Code:
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
Dim d As Date = Date.Now
[code].....
I'm actually only interested in the date part as the label text shows so f is more than I want.But also, the day and month are reversed.
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Mar 25, 2011
when i am trying this Date.Compare(Format(DateTimePicker1.Value.Date, "dd/MM/yyyy"), Convert.ToDateTime(dr(1))) < 0 it gives an error message as "Conversion from string "23/06/2011" to type 'Date' is not valid."where dr(1) is database field in text format as 29/3/2011 (dd/mm/yyyy) .
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Mar 14, 2012
DateAdd(mm, - 7*3, getdate()) DateAdd(ss, - 1, getdate()) Need to convert to vb.net
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Jan 31, 2011
i want to convert numeric value into date format and vice versa.since i'm new in vb.net.will you plz help me to know about the process of convertion?
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Jan 3, 2009
i am using date time picker and i am selecting 1 date from calender.after selection of that date i want to refresh date time picker i.e. it should display todays date.
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Aug 15, 2009
I did a clean install and tried to get the project running again. The code ... AlteredDate = SelectedDay & "/" & SelectedMonth & "/" & SelectedYear would always work defaulting to DD/MM/YYYY before the clean install. The program now runs an error "Conversion from string "13/8/2009" to type Date is not valid.. How do I change the default back to DD MM YYYY or format it to that?
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Dec 3, 2008
I have a date that is in string format and I want to put it in a datetime field. I tried
[Code]...
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Nov 5, 2009
For example, today is 05/11/2009, I have two text box.
Actually it means that whatever what date i choose within the current month, the two textbox will display the last three months date.
For Example, Current Month is November 2009 , Textbox 1 will show 01/08/2009, Textbox 2 will show 31/10/2009.
Another example is Current Month is January 2009, Textbox 1 will show 01/10/2009, Textbox 2 will show 31/12/2008.
May I know how the vb.net code should look like?
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Jun 28, 2011
i am trying to put my string that i receive in yyyy/mm/dd format in my label.i am how ever getting the following error..Conversion from string "20110627" to type 'Date' is not valid.[code]
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Aug 2, 2010
I have a string in the format of 20100730 which i need to convert to UK format of 30/07/2010.
When i try to set 20100730 as a date it says it is not valid. Is there another way i can do this?
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May 2, 2011
How to convert an excel serial date as 39051,4387847222 in a datetime as 30/11/06 10:31:51 2549
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Apr 25, 2012
In my windows application i am converting the system date format using ow.date.tostring("dd-MMM-yyyy")it is converting in some systems which have system date format mm/dd/yyyy otherwise i am getting errorso for this i am changing the date format in system regional settings in clients systems manuallyi want to convert date format without changing the date format means if the system date format what ever it may be the date format have to convert
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Aug 30, 2011
i have a problem with my Date/Time. i user comboboxes for the date.when i save the data there's a mesage show like this: This is my code for the date:
[Code]...
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Apr 8, 2011
I am encountering an error in the following statement:For i As Integer = 0 To dtAccess.Rows.Count - 1 If dtAccess.Rows(i).Item("YMD") = dateval then dtAccess is a datatable where the column YMD is of type string.dateval is a variable of type date. Now here is the anomaly. The first ten rows works fine during the loop execution. However when the 11th row is encounter I get the following error:"Conversion from type string to date is not valid." My question is that if it is not valid then why it worked for the first ten rows? My second question is what can I do to overcome the error?
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Oct 14, 2010
I am calculating a date for employees to resume work.Now if the date for instance falls on friday, that means the employee has to reutrn to work the next day which will be saturday.This is rigth but what i want is even though the return date falls on weekend, i want to be able to shift the date to the next working day ..Monday for example.so that it will not show that the employee has to return on any weekend day if there falls one.But rather a working day Monday Date.[code]....
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Nov 15, 2011
I have a program that should display report let say from a date to date. but i am using string compare and not date compare. what is my problem is it is not displaying the correct output and always shows a dialog box that request parameter.-how do i make so that the default parameter box not showing?-how do i make the report display the output correctly?-the connections always show "logon failed" and need to be refreshed everytime i want to display the report.
Imports CrystalDecisions.CrystalReports.Engine
Imports CrystalDecisions.Shared
Public Class BKCictSpecsReport
[code]....
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Jun 30, 2009
I am creating a program that will use sql 2008 as a back end and have run into an issue passing the date from the program to the database, where the date is also listed as 1900-01-01 in the database.The data type in the database is smalldatetime and i am trying to only display the date.If i change the datatype to date in the database i get the error that "sqlunhandled exception: Operand type clash: int is incompatible with date" Ideally id like to display the date in a dd/mm/yyyy format.[code].........
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Jun 2, 2008
I am an Australian user so use date format dd/mm/yyyy...my frmMain has a list box that retrieves a list of date values from the access db and displays them in the correct format (15/12/2000 - dd/mm/yyyy). When I update the DB using that same date the date format becomes reversed (ie interprets as 12/15/2000 - mm/dd/yyyy). [code] I believe the problem is something to do with the fact I am enclosing my date in my code with #'s and that somewhere between visual studio and access, the dates are getting flipped. [code]
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Dec 10, 2009
i've done a search on this error n found no match so i decided to create a new thread.this part of the program is suppose to get the date interval of dd(due date) and dr(date return) n charge the members accordingly.the program opens normally but when i go thru the records i have in my database, conversion from string "" to 'date' is not valid pops up.[code]
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Dec 27, 2010
I am trying to convert text in a text box (txtEventDate.Text) to a date type in a structure: ThisEvent.EventDate (declared as date). The text in the textbox is of the form: 05/18/1927 (i.e. May 18th, 1927) and after looking long and hard thru the forums attempting several different things, like:
'ThisEvent.EventDate = CDate(Format("#" & txtEventDate.Text & "#", "mm/dd/yyyy"))
'ThisEvent.EventDate = Date.Parse(txtEventDate.Text & "12:01:00 AM")
'Date.TryParse(txtEventDate.Text, ThisEvent.EventDate)
The code is commented out because none of them convert the string to a date value (I know a date does not have a format and I have looked thru the MSDN). How can I stay logged and composing a thread past some arbitrary time limit that forces a re-login?
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