generate onClientClick in Render(HtmlTextWriter writer)

Question

User430679683 posted

Hi all,

 

I'm writing a "toolbar" component below is one of my button 's example. 

- The question is, I want to generate out the onclientclick event in this function.  But onclientclick is not available in HtmlTextWriterAttribute.  May I know how am i going to code it?

- second question is, if I want to public out this compoent's "add button" able to access from outside like example:

  toolbarcomponent.BtnAdd;

how am i going to do it? because the render is only render out in html, but i can't access it.

protected override void Render(HtmlTextWriter writer)
        {
            writer.AddAttribute(HtmlTextWriterAttribute.Type, "button");
            writer.AddAttribute(HtmlTextWriterAttribute.Name, this.UniqueID + "_tb_add");
            if ((bool)ViewState["AddDisable"])
                writer.AddAttribute(HtmlTextWriterAttribute.Disabled, "true");
            writer.AddAttribute(HtmlTextWriterAttribute.Value, addText);
            writer.AddAttribute(HtmlTextWriterAttribute.Width, "100");
            writer.AddAttribute(HtmlTextWriterAttribute.Src, "/Images/add.ico");

            writer.AddAttribute(HtmlTextWriterAttribute.Onclick, Page.GetPostBackClientEvent(this, "OnAddButtonClick"));
            writer.RenderBeginTag(HtmlTextWriterTag.Input);
            writer.RenderEndTag();

            base.Render(writer);
        }

Thank you

Regards,

TanMH

Answer 1

User191633014 posted

for the first question:

writer.AddAttribute(HtmlTextWriterAttribute.Onclick, "MyFunction");

Answer 2

User430679683 posted

thx steelymar,

I think the method I can't use is because i already have one server post back for onclick. which I want is onclientclick.

but any way. i found a solution.

add those code at constructor:

 

            buttonAdd = new Button();
            buttonAdd.Text = addText;
            buttonAdd.ID = this.UniqueID + "_tb_add";
            buttonAdd.Width = 100;

            buttonAdd.OnClientClick = "My javascript function();";
            this.Controls.Add(buttonAdd);
            buttonAdd.Click += new EventHandler(OnAddButtonClick);

 

then in the render it should come out the thing you wan.

if no  then we can actually use buttonAdd.RenderControl(writer);

These method will able to solved my first and second question. :)

 

Thank you for reply.