Why does my alert message doesn't show up after I leave txtSchoolOffice and txtSODesc blanked.

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This is my code(addSchoolOffice.aspx.cs):

C#

protected void btnAdd_Click(object sender, EventArgs e)
    {
        if (txtSchoolOffice.Text == "" || txtSODesc.Text == "")
        {
            ClientScript.RegisterStartupScript(this.GetType(), "myalert", "alert('Fill all the necessary information.');", true);
        }
        else
        {
            blSchool.addOff(txtSchoolOffice.Text,
                txtSODesc.Text);
            Response.Redirect("~/MaintenanceOFF.aspx");
        }
    }

This is at my addSchoolOffice.aspx

C#

<asp:Button ID="btnAdd" class="buttonsMainteUN"  runat="server" Text="Add" 
            ToolTip="Add a school/office" onclick="btnAdd_Click"/>

Posted 12-Aug-13 19:00pm

timJosh

Updated 12-Aug-13 19:37pm

Thanks7872

v4

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Comments

Thanks7872 13-Aug-13 1:41am

Show the definition of txtSchoolOffice.Text and txtSODesc.Text.

Further,i don't know why you are checking it at server side.

2 solutions

Solution 2

Use FilteredTextBoxExtender instead

Sample

XML

<asp:TextBox ID="txtRentalPeriodPoint" runat="server" CssClass="fromborder" Width="75"
                                                    MaxLength="3"></asp:TextBox>
                                                <ajaxToolkit:FilteredTextBoxExtender ID="FilteredTextBoxExtender6" runat="server"
                                                    TargetControlID="txtRentalPeriodPoint" FilterType="Numbers" Enabled="True" />
                                                (Hrs) </span>

Posted 12-Aug-13 19:42pm

Mukesh Ghosh

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macmacmacmac · Accepted Answer · 2013-08-12T19:39:00

Solution 1

instead of

ClientScript.RegisterStartupScript(this.GetType(), "myalert", "alert('Fill all the necessary information.');", true);

try this:

Page.ClientScript.RegisterClientScriptBlock(typeof(Page), "Alert", "alert('Fill all the necessary information.')", true);

or debug your control using breakpoint.

Posted 12-Aug-13 19:39pm

macmacmacmac

Updated 12-Aug-13 19:40pm

v2

Comments

timJosh 13-Aug-13 4:13am

tnx to your response but it still doesn't work. What else can I do?

timJosh 13-Aug-13 4:31am

I am using a watermark for my textbox and it is the one being captured instead of a blank textbox, I still want the watermark though here's the code for the txtbox:

<asp:TextBox ID="txtSchoolOffice" runat="server"
Width="200px" text="" onfocus="if (this.value == 'Enter school/office name') this.value = '';" onblur="if (this.value == '') this.value = 'Enter school/office name';" value="Enter school/office name" style="color:Gray; text-align:left;" xmlns:asp="#unknown">

macmacmacmac 14-Aug-13 1:22am

i copied your textbox codes, and i transferred the textbox value to a messagebox. it works fine. just make sure that you put /> at the end of your code. it doesn't have an ending tag