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Last post Nov 24, 2016 06:40 AM by Eric Du

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Lexi85

Member

200 Points

692 Posts

saving image with specific name before javascript function

Nov 23, 2016 12:01 PM|Lexi85|LINK

hello

I have below code which convert text to imag on page load

I want this to happen before any other javascript function..I have a javascript function function init()(in aspx page)..I want the below code to happen before function init() how do i do that?

 <asp:Label ID="Label1" runat="server" Text="1234" />
Dim text As String = Label1.Text.Trim()
        Dim bitmap As New Bitmap(1, 1)
        Dim font As New Font("Arial", 25, FontStyle.Regular, GraphicsUnit.Pixel)
        Dim graphics As Graphics = Graphics.FromImage(bitmap)
        Dim width As Integer = CInt(graphics.MeasureString(text, font).Width)
        Dim height As Integer = CInt(graphics.MeasureString(text, font).Height)
        bitmap = New Bitmap(bitmap, New Size(width, height))
        graphics = Graphics.FromImage(bitmap)
        graphics.Clear(Color.White)
        graphics.SmoothingMode = SmoothingMode.AntiAlias
        graphics.TextRenderingHint = TextRenderingHint.AntiAlias
        graphics.DrawString(text, font, New SolidBrush(Color.FromArgb(255, 0, 0)), 0, 0)
        graphics.Flush()
        graphics.Dispose()
        Dim fileName As String = Path.GetFileNameWithoutExtension(Path.GetRandomFileName()) & ".jpg"
        bitmap.Save(Server.MapPath("/imgs/12.jpg") & fileName, ImageFormat.Jpeg)

- Reply
Eric Du

Contributor

4560 Points

1940 Posts
Re: saving image with specific name before javascript function

Nov 24, 2016 06:40 AM|Eric Du|LINK
Hi Lexi85,

According to your description, as far as I know, execute JS function is after page_load event finish. For more details, you can refer to ASP.NET Page Life Cycle Overview, this article will introduce the order of event executed. For explain this, I make a sample show how to run JS and page_load!

Here is the sample code:
```
<head runat="server">
    <title></title>
    <script src="Scripts/jquery-1.10.2.min.js"></script>
    <script>
        $(function () {
            $("#Test").css("color","red");
        });
    </script>
</head>
 protected void Page_Load(object sender, EventArgs e)
        {
            Label myLabel = new Label();
            myLabel.Text = "Testing";
            myLabel.ID = "Test";
            this.Controls.Add(myLabel);
        }
```
Result:

This result is show that after dynamically create a label control, then add style. If page execute JS before page load, JS will can not find the element! I hope you can understand my meaning, if this reply can not solve your problem, please let me know!

Best Regards,

Eric Du
MSDN Community Support
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