Gridview应用技巧收集

在某些情况下，DataGrid或者GridView的默认样式并不能满足日益高涨的用户的要求，很多人追求美观的样式。对表头设定背景也是其中的一个方面，那么有什么好的方法可以达到这一要求呢，我的方法如下：
DataGrid：

private void DataGrid1_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
    if(e.Item.ItemType == System.Web.UI.WebControls.ListItemType.Header)
    {
        e.Item.Attributes.Add("style", "background-image:url('background.gif')");
    }
}
GridView：

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.Header)
    {
        e.Row.Attributes.Add("style", "background-image:url('background.gif')");
    }
}

在DataGrid和GridView中对表头设定背景图片,不需要后台代码。 

HTML code <asp:GridViewrunat="server" ID="gvStatList" AllowPaging="false" Width="100%" CssClass="grid"
                AutoGenerateColumns="false" Visible="true" ShowFooter="false">
               <HeaderStyleCssClass="grid-head" />
</asp:GridView>CSS code

.grid-head {
    font-size: 14px;
    font-weight: normal;
    color: #FFFFFF;
    background-image: url(../images/grid-bg.gif);
    text-align:center;
    vertical-align:middle;
    height: 28px;
}

假设这样一种模型，显示用GridView，数据源用DataSet。每次获取10条信息，按每页10条分页。 
有的时候数据可能不足10条，而客户要求不足10条显示为空行，以下代码解决了这个问题。 
private DataTable FillBlank(int pageSize, DataTable dt)if (dt.Rows.Count < pageSize)
            {
                for (int i = dt.Rows.Count - 1; i < pageSize; i++)
                {
                    DataRow dr = dt.NewRow();
                    dt.Rows.Add(dr);
                }
            }
            return dt;
        }

private void BindGrid(DataTable dt)
{
        GridView.DataSource = dt;
        GridView.DataBind();
}

            

让GridView产生纵向横向的滚动条。这样就不会吧页面撑打了。

CSS code

 <style type="text/css"  id="print" media="print">
        #leftSide, #footerSide {
            display:none;
        }
    </style>
    <style type="text/css" > 
.Freezing 
   { 
    
   position:relative ; 
   table-layout:fixed;
   top:expression(this.offsetParent.scrollTop);   
   z-index: 10;
   } 

.Freezing th{text-overflow:ellipsis;overflow:hidden;white-space: nowrap;padding:2px;}
    </style>

HTML code

<div  id="Div1"  style="overflow: scroll; height: 140px;width:638px" >
Gridview 在这里
</div>

让GridView响应单击,双击事件的简单方法: 
添加选择命令字段,并设置为不可见! 
如DataView   ID   为   DataView1.然后在RowDataBound事件中,加上: 
C# code 
单击   if (e.Row.RowType == DataControlRowType.DataRow)
  {
   e.Row.Attributes.Add("onclick", "__doPostBack('GridView1','Select$" + e.Row.RowIndex + "');");
  }
双击
    if (e.Row.RowType == DataControlRowType.DataRow)
   {
      e.Row.Attributes.Add("ondbclick", "__doPostBack('GridView1','Select$" + e.Row.RowIndex + "');");
   }

合并gridview列(模板列)相同单元格
    /// <summary>
    /// 合并gridview列(模板列)相同单元格
    /// </summary>
    /// <param name="GridViewList"></param>
    /// <param name="cellNum">合并第几列单元格</param>
    //
    public static void CombineCell(GridView GridViewList, int cellNum)
    {
        int i = 0, rowSpanNum = 1;
        while (i < GridViewList.Rows.Count - 1)
        {
            GridViewRow gvr = GridViewList.Rows[i];

            for (++i; i < GridViewList.Rows.Count; i++)
            {
                GridViewRow gvrNext = GridViewList.Rows[i];
                Label lblproject1 = gvr.Cells[cellNum].FindControl("lblproject") as Label;
                Label lblproject2 = gvrNext.Cells[cellNum].FindControl("lblproject") as Label;
                if (lblproject1.Text == lblproject2.Text)
                {
                    gvrNext.Cells[cellNum].Visible = false;
                    rowSpanNum++;
                }
                else
                {
                    gvr.Cells[cellNum].RowSpan = rowSpanNum;
                    rowSpanNum = 1;
                    break;
                }

                if (i == GridViewList.Rows.Count - 1)
                {
                    gvr.Cells[cellNum].RowSpan = rowSpanNum;
                }
            }
        }
    }
    #endregion