GridView 自动换行

CSS

/*table begin*/
table{ border-collapse:collapse;border-spacing:0;}
th,td{ margin:0;padding:0; }

.tdLeftBg{ background:#EFEFEF; }
.tbGvw,.tbDefault{ margin-left:auto; margin-right:auto; }
.tbGvw,.tbGvw th,.tbGvw td,.tbDefault,.tbDefault th,.tbDefault td{ border:1px #CCC solid; padding:5px; text-align:center; }
/*单行样式*/
.tbGvw tbody .trOdd{ background:#FFF; } 
/*双行样式*/
.tbGvw tbody .trEven{ background:#f3f5f2; }

/*鼠标经过样式*/
.tbGvw tbody .trHover{ background:#e2e9ea; }

.tbGvw tbody tr .tdLeft,.tbDefault tbody tr .tdLeft{ text-align:left; }

.tbGvw .tbHeader th{font-weight:bolder;color:Black;font-size:13px; }
.tbDefault thead th{ text-align:center; }
.tbDefault tbody .tdRight{ text-align:right; }

.tbDefault caption{ background:url(../images/admin.png) no-repeat 10px 7px; padding:10px 0 10px 35px; font-weight:bold; }
/*table end*/

/*复选框*/
.tbCbl,.tbCbl td{ border:0; }
.tbCbl td{ text-align:left; }
.tbCbl td input{ cursor:pointer; }
.tbCbl td label{ padding:0 5px; cursor:pointer; } 

/*单选框列表*/
.tbRadl,.tbRadl td{ border:0; }
.tbRadl td{ text-align:left; }
.tbRadl td input{ cursor:pointer; }
.tbRadl td label{ padding:0 5px; cursor:pointer; } 

 /*自动换行*/
 .whiteSpaceNormal{white-space:normal;}

ASP.NET

<asp:GridView ID="gv_JX_JDBMX" runat="server" CssClass="tbGvw" Width="99%"  AutoGenerateColumns="false" >
        <Columns>
             <asp:BoundField HeaderText="班级" ItemStyle-Width="200" ItemStyle-CssClass="tdLeft whiteSpaceNormal"/>
        </Columns>
</asp:GridView>