add combobox items with different text and value

We can do it with DataBinding a combobox with DataSet or DataTable object. And we can also do it with customer objects. There are two ways to do this.

Here is the customer object:

public class cbxItem
{
private string _Text;
private long _Value;
public string Text{get{return _Text;}}
public long Value{get{return _Value;}}
public cbxItem(string theText, long theValue)
{
_Text = theText;
_Value = theValue;
}
}

Way 1: using DataBinding with customer objects as DataSet

……
ArrayList cbxObjects= new ArrayList();
while(theDataReader.Read())
{
cbxObjects.Add (new cbxItem (theDataReader.GetString(1),theDataReader.GetInt32 (0)));
}
this.ComboBox1.DataSource = Authors;
this.ComboBox1.DisplayMember =”Text”;
this.ComboBox1.ValueMember = “Value”;
……

Way 2: directly using ComboBox.items.Add(obj) with customer objects:

……
while(theDataReader.Read())
{
ComboBox1.Items.Add (new cbxItem (theDataReader.GetString(1),theDataReader.GetInt32 (0)));
}
……

GridView’s border setting doesn’t work in IE!

I only tried IE7.0, but it did donot work well if you have this setting in your GridView:

<asp:GridView ID=”GridView1″ runat=”server” BorderColor=”red” BoderStyle=”Solid” BorderWidth=”1px” RowStyle-BorderColor=”blue” RowStyle-BorderStyle=”Solid” RowStyle-BorderWidth=”1px” ……>

<……/>

But using css works:

1. create css class

<style type=”text/css”>
table.GridViewCss  td,th
{
height:25px;
color:#333333;
border:solid 1px #6A8CA5;
border-collapse: collapse;
}

table.GridViewCss
{
height:25px;
color:#333333;
border:solid 1px #6A8CA5;
border-collapse: collapse;

}
</style>

2. use it

<asp:GridView ID=”GridView1″ runat=”server” CssClass=”GridViewCss” ……>

<……/>

use OnClientClick of LinkButton with bound data

I have some linkButtons in GridView, and I want to call a client-side javascript method with bound data when user click on it.

<asp:LinkButton OnClientClick=’<%# “alert(‘” + Eval(“something”) + “‘)” %>’ ……>

unfortunately, it doesn’t work.

<asp:LinkButton OnClientClick=’<%#  Eval(“something”, “alert(‘{0}’)” %>’ ……>

it doesn’t work too.

Only works for me when use codebehind:

protected void GridView1_OnRowDataBound(object sender, GridViewRowEventArgs e)
{
 if (e.Row.RowType == DataControlRowType.DataRow)
 {
 LinkButton lnkbtn = (LinkButton)e.Row.FindControl("lnkbtn");
 string st= DataBinder.Eval(e.Row.DataItem, "something").ToString();
 lnkbtn.Attributes.Add("onclick", string.Format("alert('{0}')", st));
 }
}

Create XMLHttpRequest object

var xmlHttp = false;
function getXmlHttpRequestObject() {
 // check for native XMLHttpRequest object
 if(window.XMLHttpRequest && !(window.ActiveXObject)) {  
  try {
   xmlHttp = new XMLHttpRequest(); 
  }
  catch(e) {
   xmlHttp = false;
  }
 }
 // check for IE/Windows ActiveX version
 else if(window.ActiveXObject) {
  try {
   xmlHttp = new ActiveXObject(“Msxml2.XMLHTTP”);
  }
  catch(e) {
   try {
    xmlHttp = new ActiveXObject(“Microsoft.XMLHTTP”);
   }
   catch(e) {
    xmlHttp = false;
   }
  }
 }
}

The XMLHttpRequest object can make requests only to the same domain as the currently loaded page. This security policy is also known as the “same origin” policy.