Validate Control on Specific condition

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Hello,
I want to perform required field validation on specific condition..
example: suppose I have 1 dropdown, 2 textbox and 1 submit button

if dropdown selectvalue is "1" then 1textbox should be perform required field validation on submit button click or
otherwise 2textbox perform validation.

Posted 8-Jan-14 22:33pm

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Karthik_Mahalingam 9-Jan-14 4:39am

c# or javascript ?

3 solutions

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Karthik_Mahalingam · Accepted Answer · 2014-01-08T22:47:00

try this sample.

HTML

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <script src="jquery-1.10.2.js" type="text/javascript"></script>
     
</head>
<body>
    <form id="form1" runat="server">
    <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
    <br />
    <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox><br />
    <asp:DropDownList ID="ddl" runat="server">
        
        <asp:ListItem Text="1" />
        <asp:ListItem Text="2" />
    </asp:DropDownList>
    <br />
    <asp:Label ID="lblMessage" runat="server"></asp:Label>
    <br />
    <asp:Button ID="btnSubmit" runat="server" Text="Submit" OnClick="btnSubmit_Click" />
    </form>
</body>
</html>

code behind:

C#

protected void Page_Load(object sender, EventArgs e)
      {
          if (!Page.IsPostBack)
          {
              lblMessage.Text = "";
          }
      }



      protected void btnSubmit_Click(object sender, EventArgs e)
      {

          if (ddl.Text == "1")
          {
              if (TextBox1.Text == "")
              {
                  lblMessage.Text = "please enter TextBox1 text";
                  return;
              }
          }
          else if (ddl.Text == "2")
          {
              if (TextBox2.Text == "")
              {
                  lblMessage.Text = "please enter TextBox2 text";
                  return;
              }
          }
          lblMessage.Text = "success";


      }

Zubair Alie · Accepted Answer · 2014-01-08T22:48:00

What i understood is as follows
You have two textboxes to be validated on custom provided conditions.

If DropDown.SelectedIndex = 1 Then Validate only TextBox1
OTHERWISE
Validate both TextBoxes

Solution1:
On SelectedIndexChange of DropDown =>
Check IF[SelectedIndex = 1] THEN disable TextBox2 validator ELSE Enable TextBox2 validator

Solution2:
Use Custom validator as used in this link[^]

TrushnaK · Accepted Answer · 2014-01-08T22:52:00

try this javascript function:-

XML

function validate() {
         if (document.getElementById("<%= ddlSlct.ClientID%> ").value == "1") {
             if (document.getElementById("<%= taxbox1.ClientID%> ").value != "") {
                 alert("textbox1 is empty");
             }
             else {
             if (document.getElementById("<%= taxbox2.ClientID%> ").value != "") {
                 alert("textbox2 is empty");
             }
         }
    }

<asp:Button ID="btnSubmit" runat="server" OnClientClick="validate();" />

make changes in function as per your validation.
i have just check if it is empty or not.

Validate Control on Specific condition

3 solutions

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