Use Convert.ToInt32 to convert input value in asp:textbox to integer (C#) : TextBox « ASP.net Controls « ASP.NET Tutorial






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  3. TextBox
<%@ Page Language="C#" %>

<script runat="server">
  void btSubmit_Click(Object Sender, EventArgs e) {
     lblMessage.Text = (Convert.ToInt32(tbNumber1.Text) * Convert.ToInt32(tbNumber2.Text)).ToString();
  }
</script>

<HTML>
<HEAD>

</HEAD>
<BODY>
<form runat="server">

    Number 1: <asp:textbox id="tbNumber1" runat=server/>
    Number 2: <asp:textbox id="tbNumber2" runat=server/>
    <asp:button id="btSubmit" Text="Submit" OnClick="btSubmit_Click" runat=server/>
    <asp:label id="lblMessage" font-size="20pt" runat=server/>

</form>

</BODY>
</HTML>








3.5.TextBox
3.5.1.Important properties, method and event of TextBox control
3.5.2.TextBox can display different types of input fields depending TextMode property
3.5.3.Show AutoComplete
3.5.4.Set the focus to a TextBox
3.5.5.Get input value from asp:textbox (VB.net)
3.5.6.Set textbox text value in button action
3.5.7.asp:TextBox changed event (C#)
3.5.8.Use if statement to check form input data (VB.net)
3.5.9.Bind string value to asp:textBox (VB.net)
3.5.10.Use Cint to convert input value in asp:textbox to integer (VB)
3.5.11.Use Convert.ToInt32 to convert input value in asp:textbox to integer (C#)
3.5.12.Check form input value and report error in case of empty input (VB.net)
3.5.13.Set AutoCompleteType
3.5.14.Convert input in TextBox into decimal
3.5.15.Extrapolate date values from the typed text