Object reference not set to an instance of an object.-i got null value of checkbox ar

[satiss7pwr]

public CheckBox[] cb = null;
int z=0;
protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
        {
        cb = new CheckBox[count - k];
        //Database code.........
        while (dr.Read())//read data from access database
                {
            cb[z] = new CheckBox();
                    cb[z].Text = dr["Member_Name"].ToString();
                        Panel2.Controls.Add(cb[z]);
                        Panel2.Controls.Add(new LiteralControl("</br>"));
                        z = z + 1;
        }
    }
}
protected void Button6_Click(object sender, EventArgs e)
{
        for (int x = 0; x < cb.Length; x++)//ERROR IS HERE:Object reference not set to an instance of an object.
        {
        //processing check boxes    
    }
}

[tlhintoq]

You made an array for checkboxes, but you did not initialize each element of that array. You need to make a checkbox for each element and assign it to the element.

[Frinavale]

Better yet, use a CheckBoxList control.

All you'll have to do is retrieve the data from your database, specify that the data table returned from this is to be used as the DataSource for the CheckBoxList control. Then specify what field should be used as the "value" (using the CheckBoxList.DataValueField property ) and what field should be used for the "text" (using the CheckBoxList.DataTextField property)....and then call the CheckBoxList.DataBind method to bind the data source to the CheckBoxList.

-Frinny