ASP.Net GridView - Align data Center Horizontally and Middle Vertically

Thanks i found problem

i set this code im my css file

html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, font, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i, center,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td {
    margin: 0;
    padding: 0;
    border: 0;
    outline: 0;
    font-size: 100%;
    vertical-align: baseline;
    background: transparent;
}
body {
    line-height: 1;
     font-family:Tahoma;
     direction:rtl;

}
ol, ul {
    list-style: none;
}
blockquote, q {
    quotes: none;
}


:focus {
    outline: 0;
}


ins {
    text-decoration: none;
}
del {
    text-decoration: line-through;
}


table {
    border-collapse: collapse;
    border-spacing: 0;
}

when i delete those code my gridview worked correctly