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Undvika postback i button

Äntligen har jag kommit på hur man kan skippa oönskad postback i button. Det finns många olika lösningar. Här är ett intressant inlägg på stackoverflow om det. Men det enklaste sättet är egentligen bara lägga till

return false;

i onclick…

Här är lösningen

using System.Web.UI.HtmlControls;
...
HtmlButton HtmlButtonSendMail;
protected override void CreateChildControls() 
{
...
#region Configure Send Email
     HtmlButtonSendMail = new HtmlButton();
     HtmlButtonSendMail.InnerText = "Send Email";
     HtmlButtonSendMail.ID = "HtmlButtonSendMail";
     string script = "";
     script += "SP.UI.Notify.addNotification('Loading..', false);";
     script += "var options = {";
     script += "  url: \"../_layouts/Toolbox/SendMail.aspx\",";
     script += "  width: 800,";
     script += "  height: 680,";
     script += "  allowMaximize: false";
     script += "};";
     script += "SP.UI.ModalDialog.showModalDialog(options);";
     script += "return false;";
     HtmlButtonSendMail.Attributes.Add("onclick", script);
     HtmlButtonSendMail.Attributes.Add("title", 
               "Skicka mail till\r\nde här personerna");
     Controls.Add(HtmlButtonSendMail);                
#endregion
...
}
...
protected override void Render(HtmlTextWriter writer)
{
    ...
    writer.RenderBeginTag(HtmlTextWriterTag.Div);
    HtmlButtonSendMail.RenderControl(writer);
    writer.RenderEndTag();//div    
    ...
}
... other javascript stuff needed to work with your ajax solution
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One response to “Undvika postback i button

  1. sharepointkunskap 2011-07-08 at 17:00

    Funkar så klart inte med , funkar inte med heller, däremot funkar med de flesta andra html-kontroller, t.ex:

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