Refer to the link ASP.NET: TextBox and EnableViewState=’False’
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Refer to the link ASP.NET: TextBox and EnableViewState=’False’
Permalink(I don’t understand ‘tyring to insert/update data’, ‘webcontrol is not associated with it’s property’!)
//
if you write code using parametrized query as
paramxxx.value = textbox1
it’ll show above error
to resolve it it should be
paramxxx.value =textbox1.text
//This kind of error message can occur when you are trying to insert/update data or any kind of operation which involves textbox/dropdownlist
The issue occurs if the webcontrol is not associated with its property
May be you have not associated the appropriate property of the control
i.e textBox1.Text
or dropdownlist1.SelectedItem.Value
For security reason, TextBox with TextMode=’Password’ setting cannot be assigned or populated via the Text property on Page_Load or PostBack event.
It’s not recommend for to prefill a ‘Password’ type TextBox with the(‘***’) characters, though below is the solution to achieve this.
VB.NET
ViewState('Pwd')=TextBox1.Text ;
TextBox1.Attributes.Add('value', ViewState('Pwd').ToString ()) ;
C#
ViewState['Pwd']=TextBox1.Text ;
TextBox1.Attributes.Add('value', ViewState['Pwd'].ToString ()) ;
PermalinkFor type Casting apply the following steps
VB.NET
dim aprtxt as string
aprtxt= CType(e.Item.FindControl('txtapr'), TextBox)
C#
string aprtxt;
aprtxt = (TextBox) e.Item.FindControl['txtapr'];
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<asp:TextBox id='txtNumber' Runat='server' />
<asp:RegularExpressionValidator ID='vldNumber' ControlToValidate='txtNumber' Display='Dynamic' ErrorMessage='Not a number' ValidationExpression='(^([0-9]*|\d*\d{1}?\d*)$)' Runat='server'>
</asp:RegularExpressionValidator>
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<asp:TextBox id='TextBox1' style='Z-INDEX: 101; LEFT: 0px; POSITION: absolute; TOP: 112px' runat='server' TextMode='MultiLine'></asp:TextBox>
<asp:RegularExpressionValidator id='RegularExpressionValidator1' style='Z-INDEX: 102; LEFT: 216px; POSITION: absolute; TOP: 112px'
runat='server' ErrorMessage='MaxLength is 20' ControlToValidate='TextBox1' ValidationExpression='^\w{1,20}
>
</asp:RegularExpressionValidator>
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<script lang='javascript'>
function CheckFunction()
{
if (document.getElementById(’<%=textbox2.ClientID%>’).value == '')
{
alert('Please enter a value');
return;
}
}
</script>
<asp:textbox id='textbox2' runat='Server'></asp:textbox>
<input type=button id='btn1' onclick='javascript:CheckFunction();' value='Click'>
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<asp:TextBox id='TextBox1' dir=rtl runat='server'></asp:TextBox>
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<asp:TextBox id='TextBox1' BackColor =<%#colCon.ConvertFromString(bgcolor)%> runat='server'>
</asp:TextBox>
VB.NET
Protected colCon As New System.Drawing.ColorConverter
Protected bgcolor As String = '#556600'
’In Page_Load
Page.DataBind()
C#
protected System.Drawing.ColorConverter colCon =new System.Drawing.ColorConverter();
protected string bgcolor = '#556600';
//In Page_Load
Page.Databind();
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Product ID : <asp:TextBox id='TextBox1' style='Z-INDEX: 101; LEFT: 80px; POSITION: absolute; TOP: 64px' runat='server'></asp:TextBox>
Product Name:<asp:TextBox id='TextBox2' style='Z-INDEX: 102; LEFT: 80px; POSITION: absolute; TOP: 112px' runat='server'></asp:TextBox>
VB.NET
’Populate the DataSet
’...
’Display in TextBoxes using Column Name
TextBox1.Text = ds.Tables (0).Rows(0)('ProductId').ToString ();
TextBox2.Text =ds.Tables (0).Rows(0)('ProductName').ToString ();
’Display in TextBoxes using Column Index
TextBox1.Text = ds.Tables (0).Rows(0)(0).ToString ();
TextBox2.Text =ds.Tables (0).Rows(0)(1).ToString ();
C#
//Populate the DataSet
//...
//Display in TextBoxes using Column Name
TextBox1.Text = ds.Tables [0].Rows[0]['ProductId'].ToString ();
TextBox2.Text =ds.Tables [0].Rows[0]['ProductName'].ToString ();
//Display in TextBoxes using Column Index
TextBox1.Text = ds.Tables [0].Rows[0][0].ToString ();
TextBox2.Text =ds.Tables [0].Rows[0][1].ToString ();
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Id : <asp:TextBox id='TextBox1' style='Z-INDEX: 102; LEFT: 128px; POSITION: absolute; TOP: 32px' runat='server'></asp:TextBox>
Name : <asp:TextBox id='TextBox2' style='Z-INDEX: 103; LEFT: 128px; POSITION: absolute; TOP: 72px' runat='server'></asp:TextBox>
VB.NET
Dim cn As SqlConnection
Dim cmd As SqlCommand
Dim rdr As SqlDataReader
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
’ Put user code to initialize the page here
Try
cn = New SqlConnection('server=localhost;uid=sa;pwd=;database=northwind')
cmd = New SqlCommand('select * from Products where productid =1', cn)
cn.Open()
rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection)
rdr.Read()
TextBox1.Text = rdr('ProductId').ToString()
TextBox2.Text = rdr('ProductName').ToString()
Catch ex As Exception
Response.Write(ex.Message.ToString())
Finally
rdr.Close()
cn.Close()
End Try
End Sub
C#
SqlConnection cn ;
SqlCommand cmd ;
SqlDataReader rdr ;
private void Page_Load(object sender, System.EventArgs e)
{
// Put user code to initialize the page here
try
{
cn = new SqlConnection('server=localhost;uid=sa;pwd=;database=northwind');
cmd = new SqlCommand( 'select * from Products where productid=1 ', cn);
cn.Open();
rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection );
rdr.Read ();
TextBox1.Text =rdr['ProductId'].ToString ();
TextBox2.Text =rdr['ProductName'].ToString ();
}
catch (Exception ex)
{
Response.Write (ex.Message.ToString ());
}
finally
{
rdr.Close();
cn.Close();
}
}
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<asp:PlaceHolder id='PlaceHolder1' runat='server'></asp:PlaceHolder>
VB.NET
Dim textboxes(5) As TextBox
Dim i As Integer
For i = 0 To 4
textboxes(i) = New TextBox()
textboxes(i).ID = 'TextBox' + i
textboxes(i).AutoPostBack = True
PlaceHolder1.Controls.Add(textboxes(i))
Next
C#
TextBox[] textboxes = new TextBox[5];
for (int i=0; i<5; i++)
{
textboxes[i] = new TextBox();
textboxes[i].ID = 'TextBox' + i;
textboxes[i].AutoPostBack = true;
PlaceHolder1.Controls.Add(textboxes[i]);
}
PermalinkYou can use the TextBox webserver control and set the TextMode = MultiLine
PermalinkVB.NET
Dim dt As DateTime = DateTime.Parse(TextBox1.Text)
C#
DateTime dt = DateTime.Parse(TextBox1.Text);
By default Date.Parse check the date as MDY format
Refer DateTime.Parse for a specified Date Format.
VB.NET
Textbox1.Text= dsData.Tables(0).Rows(0)('FieldName').ToString()
C#
TextBox1.Text=dsData.Tables[0].Rows[0]['FieldName'].ToString();
PermalinkVB.NET
Dim ctl As Control
For Each ctl In Page.Controls(1).Controls
If TypeOf ctl Is TextBox Then
CType(ctl, TextBox).Text = ''
End If
Next
C#
foreach (Control ctl in Page.Controls[1].Controls )
{
TextBox tb = ctl as TextBox;
if (tb!=null)
{
tb.Text = '' ;
}
}
Note: Page.Controls[1]=> control is within the
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