Sorry, ich habe die Frage beim ersten Mal falsch gelesen.
Hier ist eine JavaScript-Lösung:
function DisplayTextFromRepeater()
{
var text = '';
var repeater = document.getElementById('MyRepeater');
var inputs = repeater.getElementsById('input');
var txtId = 'MyTextBox' //ID of textbox in repeater template
for(var i = 0; i < inputs.length; i++)
{
if(inputs[i].type == 'text')
{
if(inputs[i].id.indexOf(txtId) != -1)
{
text = text + inputs[i].value;
}
}
}
OpenNewWindow(text);
}
function OpenNewWindow(message)
{
var OpenWindow = window.open("", "newwin", "height=250, width=250,toolbar=no,scrollbars=yes,menubar=no");
OpenWindow.document.write("<html>");
OpenWindow.document.write("<title>Title Goes Here</title>");
OpenWindow.document.write("<body>");
OpenWindow.document.write(message);
OpenWindow.document.write("</body>");
OpenWindow.document.write("</html>");
}