InvalidCastException - Trying To Search Database?
Sep 29, 2010
I am using Visual Studio 2005, Version 2.0. Coding a windows application with VB.NET.I am trying to use a textbox (txtLogCall) to display matched results in a datagrid. I have added a bindingsource and have the dataset and tableadapter.
I have set the databinding tag of the datagrid to the field that I want to use as a parameter. The textbox is for an Caller's Name, so I have set the datagrid tag to 'EmergencyCallerIdentification' that is in the table.
[Code]...
View 2 Replies
ADVERTISEMENT
May 7, 2010
Visual Basic 2008 I'm trying to delete a row from an Access database in my DataGridView using a coded delete button. I have an input box asking for a row number to delete. It works fine except if I have anything but an interger, leave the input blank, or hit the cancel, I get :
[Code]...
View 1 Replies
Apr 25, 2012
below is my piece of code where I click on "Edit button" then retrieve the data from access database so that I edit them on a form.
This is what I get when I click on edit: InvalidCastException was unhandled and highlights the line below The UserID contain Alphanumeric characters.
'check for the selected item in list
If lvUsersList.SelectedItems.Count > 0 Then
If Me.lvUsersList.SelectedItems.Count > 0 Then
[Code].....
View 1 Replies
Nov 3, 2011
I'm having problems with an Invalid Cast Exception when I try and read a PDF from a database as a BLOB. I am able to write the files into the database no problems at all,however, when I try to retrieve them I just get InvalidCastException.Here is the code I'm using:
Protected Sub btnPDF_Click(sender As Object, e As EventArgs) Handles btnPDF.Click
' Request.QueryString["docid"].ToString();
Dim docuid As String = "b39a443d-ccfd-47f4-b333-f12cd94683d6"
[code].....
View 1 Replies
Dec 28, 2009
I have a MS access database connected to a VB2008 developed software.
I want to make a search button to search through all the tables in the database.
how can I do this?
I want to link a field in table one to a field in table 2 in the database so that they are the same ( whenever I change what is in table 1 table 2 changes to the same automaticaly )
View 7 Replies
Feb 3, 2009
I have created a database software in VB and i would like to add a search facility to it. how can i do that?i have done the search design in a form. it gives user options to select what they want to search from a drop down combo box.and i have a result button.i would like to know what kind of code will this button require to display the results.
View 7 Replies
Mar 11, 2010
I need help to create a search button vb.net to search a access database that is binded in vb.net. I want to search for 2 items in the database and display then in the datagrid. the code i done is here. Dim da = New OleDb.OleDbDataAdapter()
[Code]...
View 1 Replies
Sep 27, 2011
I have written some software for a company I want to start, basically I want to supply automotive parts. The software I have created uses a database to hold information for users, parts, suppliers and so on.I want to write in a search bar so I can search for a part by name.The code I have written so far for this form is basically what is created when the new dataset wizard is used.[code]I have a datagridview that loads the data for my partslist table, underneath there is a textbox control for my search bar and a button to perform the search, underneath that I have placed another datagridview control to receive the results from the search.Can anyone help me write code to perform a search and place the results in the second datagrid control.
View 2 Replies
Mar 2, 2011
I am trying to use the .net connector within my program. I have got add, delete and update working however cannot get search to work. What I would like the program to do is, you enter a value into a textbox and then press a button. The value in the textbox is searched and then the values in the database corresponding to that value are entered into the other text boxes. This is what I have so far:
Private Sub PrescriberSearch()
pre.SelectCommand = New MySqlCommand("SELECT Name FROM Prescriber WHERE Name =?Name like Name = ?Name")
[code].....
View 8 Replies
Oct 26, 2010
I created a small program that reads an access database 2007 I added the database from the data sources window, the fields I created were ID, Name, Transaction, email and Number. where number has a YES index(no duplicates) option. And they all are TEXT types. I created a new form and added the datagrid of the database and want to create a search by number. so I click on the add query, then on the number filter I added LIKE @Number + '%' BUT IT CHANGES TO: LIKE '@Number' + '%' so the query wont work, and VB.net wont create the text field or anything. what is it that I have to do?
View 1 Replies
Oct 19, 2010
I am trying to search a database with a textbox control and I want the search results to display in a datagrid.The table I want to search is called Movies. I have a BindingSource attached to the form a long with a dataset (dsMovies) containing the Movies table and a table adapter (MoviesTableAdapter). My textbox that I want to use is called txtTitle and the datagrid is called dgMovies. This is the code I am currently using, and I am getting no results at all.
Dim strTitle As String
strTitle = txtTitle.Text
Dim con As OleDb.OleDbConnection = New
[code].....
View 5 Replies
Oct 28, 2009
how to search data from database [code] if i use this code to get data from the database..[code]
View 6 Replies
Jul 31, 2011
Now I have textbox1 and button1. I want to search from the value in textbox1 into database by click on button1.
View 1 Replies
Apr 5, 2010
How can I create a search box to search records in a sql database? I plan to use the search-box in the same Form where I have a details view interface to the database table.
View 2 Replies
Aug 15, 2011
On my form, I have many labels. Each label's name is like 23SW001, 23SW002..and so on. Then i also have an access database that has a table name tblWorkstation. Then what i want is, if the form loads, it will compare all of the label names to my database. If the label name does not exist in my database. I will change the labels background property.
View 1 Replies
Aug 2, 2010
Could anybody guide me how to perform a quick serch in vb.net database?I used to do it in vb6, using FindFirst method.Is anything else like that in vb.net?Do i always have to use SQL to check if record under current data exists in the database or not?
View 3 Replies
Aug 11, 2011
what is the code use for button search if i want to search data in database. Example if user write name at textbox and then click search button it will result a data form from database.
i am using visual studio 2005, database i use sql 2005, database name is login table name is staff column in table staff is firstname, telephone, address, password, male ..
View 1 Replies
Apr 7, 2011
I have created a bookshop website with database, I need a search engine that will search the database records and present the user with results according to the keyword.I have created the page with the text search box and search button.[code]
View 2 Replies
Jul 7, 2011
I want to search my database using textbox hers my code: I did not get error with this code but it didnt search anything on my databse..
Private cs As New SqlConnection("Data Source=DANN-D3CCEAB190\SQLEXPRESS;Initial Catalog=StudentGradeCompilation;Integrated Security=True")
Private da As New SqlDataAdapter("SELECT Studentname, Studentnocode, [Print] FROM Table_1 WHERE Studentnocode LIKE '%Maintext.text' ", cs)
[Code]....
View 1 Replies
Mar 11, 2010
I set my Date formate dd/mm/yyyy in control panel, and in Access i set coulumns field as shortDate[code]...
View 15 Replies
Mar 11, 2010
I'd like to make a little vb.net program that executes searches on a msaccess database. I use a textbox to get the value to search and than i'd like to search all the values that has the textbox value in the middle. So, the queries should look like this: SELECT Rec1, Rec2, Rec3 FROM Table1 WHERE Rec1 LIKE "*" & txtTextBox.Text & "*"...My problem is that i don't know how to pass the "*" character to my query, if I build a string that i pass to OleDbCommand(), the query returns nothing.
View 2 Replies
Jun 11, 2011
i have two fields(name,mark) in ms access table.now i want to search that through vb.net form using "name" field(not providing full name only a part or letter).In form i have one text box and a search button .the matches will be shown in same form.
View 1 Replies
May 11, 2011
iwant to search one row data from access database and display on textbox my code is
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim InputStr As String = TextBox1.Text
[Code]......
View 1 Replies
Dec 22, 2011
I am creating a database system in visual basic 2010. I have made the project almost but i can not know about the search and display function in visual basic 2010. I have posted the coding I've done below, I have created an access database to save and update the data. I have attached the database so you will have idea about the rows and columns.
Public Class Form1
Dim con As New OleDb.OleDbConnection
Dim dbProvider As String
[Code].....
View 1 Replies
Aug 1, 2011
I am using Visual Basic 2010 express and Microsoft Access 2003. I have a database with 15 columns that I'm try to retrieve data from using a search button. [Code]
View 3 Replies
Apr 4, 2012
Dim CustID As String = txtSrchCustID.Text
Dim FirstName As String = txtNewCustFName.Text
Dim SecondName As String = txtNewCustSName.Text
If CustID And FirstName And SecondName = "" Then
MsgBox("Please enter a term to search by")
EndIf
This returns "Conversion from string "" to type 'Long' is not valid." I was wondering what the error is and how it's possible to fix it? The other questions that I've looked at were mostly to do with variables assigned incorrect types, but I think that isn't the issue. It occurs when all of the variables are empty.
View 1 Replies
Oct 30, 2009
OK, this is going better, now im stuck in the mud again, i am trying to get a form to print,this works now, however i would like to enable a few frames with text boxes for a few seconds to allow the printer to print the text in black instead of gray. he error i am getting is this, as the timer disables:" Unable to cast object of type System.Windows.Forms.Timer' to type 'System.Windows.Forms.ToolStripMenuItem'. "
Public
Sub
Print_Renamed_Click(ByVal
[code].....
View 6 Replies
Apr 9, 2010
I have a field named 'UserID' in my OLE database with the type 'Autonumber'. But when I try to cast it to a variable of type 'String' I get an an InvalidCastException - Specified cast is not value.
View 16 Replies
May 15, 2011
Private Sub gvDesignGVnote_CellClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles gvDesignGVnote.CellClick
If e.RowIndex < 0 Then[code]......
View 3 Replies
Aug 15, 2010
I'm using a C# API wrapper library for connection to a program. It has worked very well for a long time, but now I have this error I can not get out of. The error occurs inside the library code (which I have not modified). It gives the following pop-up window:I believe I had this or similar type of error some times before (at least the first pop up was similar), and then I believe I just clicked "Build solution", or rebuild, and it would work. But this time not...
View 2 Replies
