Question

the below js script works fine but there is small problem and the problem is that:

i have a textbox with multiline and when the user clicks on it and it does clear the textbox but the problem is; when the user click on Save button (asp.net control button) to save the textbox value and i want that to ignore on code behind and also client side.

one thing i can do is to compare the value and clear if it is matached but what if; if i have many controls and dont want to spread the string every where in the code…

looking for a optimized solution.

<asp:TextBox runat="server" ID="txtNew" 
onclick="if (this.value == 'Enter here...') this.value = ''" TextMode="MultiLine"
Rows="7" Width="100%">Enter here...</asp:TextBox>

Answer 1

You don’t need to hardcode your Enter here..., use defaultValue instead.

<asp:TextBox runat="server" ID="txtNew" 
onclick="if (this.value == this.defaultValue) this.value = ''" TextMode="MultiLine"
Rows="7" Width="100%">Enter here...</asp:TextBox>

For the codebehind part of your question:

I would recommend to use a RequiredFieldValidator (since “Enter here” suggests that it’s mandatory). Then you can use the InititalValue property for your default text, hence the user must enter something to submit the page.