Tag Archives: textbox

Search Textbox with dropdown in vb.net

you can create a drop-down textbox somthing like Auto suggest Google search. when will you type a letter to this textbox then it will show the words starting with letter in drop down.

Let’s suppose if you type ‘a’ into textbox then textbox will suggest all words starting with letter ‘a’ in drop down.

drop-down textbox

You can do this with the help of AutoCompleteMode property in Textbox control. This property automatically matches the input string. This property is very useful for frequently searching strings. If there is duplication occurs in source data then the AutoCompleteMode property omits the duplication and display only once. We need to use AutoCompleteMode and AutoCompleteSource property must be used together.

Example

In the following example textbox control named TextBox1 suggest us employee names from the database according to input string(like picture)

Private Sub FillSearchResult()
        Dim AutoComp As New AutoCompleteStringCollection()
        Dim dsSerch As New DataSet
 
        Dim ConStr As String = "user id=sa;password=aeiouy;Initial Catalog=......."
        Dim sqlCon As New SqlClient.SqlConnection(ConStr)
        sqlCon.Open()
        Dim Str As String = "select empname from tbl_Employee"
        Dim SqlCom As New SqlClient.SqlCommand(Str, sqlCon)
        Dim sqlAdap As New SqlClient.SqlDataAdapter(SqlCom)
        sqlAdap.Fill(dsSerch)
        For i As Integer = 0 To dsSerch.Tables(0).Rows.Count - 1
            AutoComp.Add(dsSerch.Tables(0).Rows(i)(0).ToString())
        Next
 
        TextBox1.AutoCompleteMode = AutoCompleteMode.Suggest
        TextBox1.AutoCompleteSource = AutoCompleteSource.CustomSource
        TextBox1.AutoCompleteCustomSource = AutoComp
End Sub

Character casing in Textbox control

You can use the CharacterCasing property of the TextBox control in .net to change the case of characters as required by your application. For example,
you could change the case of all characters entered in a TextBox control used for username and password. When user can enter some textbox in both textbox, these textbox automatically change the text into upper case.
This example requires two textbox (txtUsername, txtPassword) and one button(see in the picture).
we can set the CharacterCasing property of the TextBox control through designer window as well as code.

 

 

[vb]

txtUsername.CharacterCasing = CharacterCasing.Upper
txtPassword.CharacterCasing = CharacterCasing.Upper

[c#]

txtUsername.CharacterCasing = CharacterCasing.Upper;
txtPassword.CharacterCasing = CharacterCasing.Upper;

Create dynamic Textbox and Label in vb.net

In this article we will learn how to create TextBox and Label control at run time in vb.net.
There are many situations in windows application development when we need to create windows controls at run time.

The following example shows how to create and add controls to group box(create textbox and label control in groupbox dynamically).
Continue reading Create dynamic Textbox and Label in vb.net