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I am using C# ASP.NET 2010

I have a Textbox with TextMode="MultiLine" and need to validate using

of course it validates, but doesn't move to next view on clicking button after validation

please help me.

What I have tried:

I tried this
In the design page....
<asp:textbox id="txtdetail" runat="server" autopostback="false" height="56px" width="240px" textmode="MultiLine" maxlength="200" required="">

<asp:regularexpressionvalidator id="RequiredFieldValidator28" runat="server" errormessage="Alphabet, Numbers and Space are allowed." controltovalidate="txtdetail" validationexpression="^[a-zA-Z0-9 ,]+$">

<asp:button id="Button3" runat="server" onclick="BtnGoToOtherDetail_Click" text="To Other Detail">

In the CodeBehind......
protected void BtnGoToOtherDetail_Click(object sender, EventArgs e)
    MultiView1.ActiveViewIndex = 2;
Updated 5-Aug-21 23:14pm
SeeSharp2 27-Jul-21 13:41pm
1. Format the question so that we can read it.
2. What do you mean it does validate but doesn't move to next view?

Your regular expression doesn't allow new-line characters. If you enter more than one line of text in the textbox, the validation will fail.

If you want the field to be required, you'll also need a required field validator.
<asp:requiredFieldValidator runat="server" controlToValidate="txtdetail" errorMessage="You must enter the detail." />

<asp:regularExpressionValidator runat="server" controlToValidate="txtdetail" validationExpression="^[a-zA-Z0-9 ,\n]+$" errorMessage="Alphabet, Numbers and Space are allowed." />

You also need to check the Page.IsValid property in your code-behind event handler.
protected void BtnGoToOtherDetail_Click(object sender, EventArgs e)
    if (Page.IsValid)
        MultiView1.ActiveViewIndex = 2;
ravitv 10-Aug-21 5:10am
Wow great Richard, It works,
Thank you so much.
Hi Sorry for late reply,
The format was not correct - I agree - and that happened due to some malfunctioning of this site at the time of posting this question.
Anyway here I post it again.

of-course it validates, but doesn't move to next view(I have 5 MultiView1.ActiveViewIndex = 1;) on clicking button after validation.


But I tried using "Required" property

<asp:textbox id="txtdetail" runat="server" cssclass="inputtxt" textmode="MultiLine" maxlength="100" required="">

It works, But I want the user NOT to enter any other character except AlphaNumeric, Hyphen, Space and Dot.
I tried Regular Validation like

<asp:regularexpressionvalidator id="RegularExpressionValidator10"
="" controltovalidate="txtdetail" validationexpression="[a-zA-Z0-9\s-.]*$" display="Static" enableclientscript="true" errormessage="Details ?" forecolor="Red" runat="server">

But it doesnt validates.
What mistake did i commit?
Please help,
Richard Deeming 6-Aug-21 5:08am
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