限制DataList,GridView行的显示长度

方法1：SQL语句

    select *,
    Title = case
    when len(tableName_title) >=18 then substring(tableName_title,0,18)+'...'
    else
    tableName_title
    end
    from tableName

方法2：html样式 

                    <div style="width: 250px; overflow: hidden; text-overflow: ellipsis;">
                        <nobr><%#Eval("tableName_title")%>
                        </a></nobr>
                    </div>

方法3：代码

<%#Eval("tableName_title").toString()>18?Eval("tableName_title").Substring(0,18):Eval("tableName_title").toString()%>