gridview列的汇总

Gridview 中我们会用到汇总的功能,因为前一段时间用到了,所以在此总结一下,作为以后的参考;

需要用到Gridview的RowDataBound事件, RowDataBound是在数据源与gridview的行绑定完成之后才执行RowDataBound方法,也就是说数据源每和gridview的行绑定完成之后都会触发此事件,首先是要把gridview的showfooter属性设置为true,以便我们利用footer行进行统计

//统计  
   Decimal mysum3 = 0;  
   Decimal mysum4 = 0;  
   Decimal mysum5 = 0;  
   Decimal mysum6 = 0;  
   Decimal mysum7 = 0;  
   protected void gvResult_RowDataBound(object sender, GridViewRowEventArgs e)  
   {} 

因为数据是会带有小数点的,所以定义decimal类型的 全局变量,存放进行数据统计之和,然后触发RowDataBound事件

if (e.Row.RowType == DataControlRowType.DataRow)  
        {  
            //统计  
            if (!string.IsNullOrEmpty(e.Row.Cells[6].Text.ToString()) && e.Row.Cells[6].Text.ToString() != " ")  
            {  
                Decimal sum1 = decimal.Parse(e.Row.Cells[6].Text.ToString());  
 mysum3mysum3 = mysum3+sum1;  
            }  
 
            if (!string.IsNullOrEmpty(e.Row.Cells[7].Text.ToString()) && e.Row.Cells[7].Text.ToString() != " ")  
            {  
                Decimal sum2 = decimal.Parse(e.Row.Cells[7].Text.ToString());  
 mysum4mysum4 = mysum4 + sum2;  
            }  
 
            if (!string.IsNullOrEmpty(e.Row.Cells[8].Text.ToString()) && e.Row.Cells[8].Text.ToString() != " ")  
            {  
                Decimal sum3 = decimal.Parse(e.Row.Cells[8].Text.ToString());  
 mysum5mysum5 = mysum5 + sum3;  
            }  
 
            if (!string.IsNullOrEmpty(e.Row.Cells[9].Text.ToString()) && e.Row.Cells[9].Text!=" ")  
            {  
                Decimal sum4 = decimal.Parse(e.Row.Cells[9].Text.ToString());  
 mysum6mysum6 = mysum6 + sum4;  
            }  
            if (!string.IsNullOrEmpty(e.Row.Cells[10].Text.ToString()) && e.Row.Cells[10].Text.ToString() != " ")  
            {  
                Decimal sum5 = decimal.Parse(e.Row.Cells[10].Text.ToString());  
 mysum7mysum7 = mysum7 + sum5;  
            }  
 
 
        } 

当源数据行和gridview行绑定完成之后,需要判断行类型是不是数据行,如果是数据行就会进入以上代码,然后需要判断gridview行的列是不是为空,和不等于 然后把当前行的列值和之前已绑定的数据行的列值进行相加；

if (e.Row.RowType == DataControlRowType.Footer)  
       {  
           e.Row.Cells[0].Text = "<span align='center' style='color:red'>合计:</span>";  
           e.Row.Cells[6].Text ="<span align='center' style='color:red'>"+ mysum3.ToString()+"</span>";  
           e.Row.Cells[7].Text = "<span align='center' style='color:red'>" + mysum4.ToString() + "</span>";  
           e.Row.Cells[8].Text = "<span align='center' style='color:red'>" + mysum5.ToString() + "</span>";  
           e.Row.Cells[9].Text = "<span align='center' style='color:red'>" + mysum6.ToString() + "</span>";  
           e.Row.Cells[10].Text = "<span align='center' style='color:red'>" + mysum7.ToString() + "</span>";  
       } 

这里也是对绑定行进行判断，如果行类型是脚注行的话，进行脚注行的赋值操作，即把数据行的列之和赋值给脚注行的某列，赋值的同时可以给脚注列添加一些样式，把字体改为红色，更醒目

效果如下：

完整代码如下：

  Decimal mysum3 = 0;
    Decimal mysum4 = 0;
    Decimal mysum5 = 0;
    Decimal mysum6 = 0;
    Decimal mysum7 = 0;
    protected void gvResult_RowDataBound(object sender, GridViewRowEventArgs e)
    {
               if (e.Row.RowType == DataControlRowType.DataRow)
        {
            //统计
            if (!string.IsNullOrEmpty(e.Row.Cells[6].Text.ToString()) && e.Row.Cells[6].Text.ToString() != " ")
            {
                Decimal sum1 = decimal.Parse(e.Row.Cells[6].Text.ToString());
                mysum3 = mysum3+sum1;
            }

            if (!string.IsNullOrEmpty(e.Row.Cells[7].Text.ToString()) && e.Row.Cells[7].Text.ToString() != " ")
            {
                Decimal sum2 = decimal.Parse(e.Row.Cells[7].Text.ToString());
                mysum4 = mysum4 + sum2;
            }

            if (!string.IsNullOrEmpty(e.Row.Cells[8].Text.ToString()) && e.Row.Cells[8].Text.ToString() != " ")
            {
                Decimal sum3 = decimal.Parse(e.Row.Cells[8].Text.ToString());
                mysum5 = mysum5 + sum3;
            }

            if (!string.IsNullOrEmpty(e.Row.Cells[9].Text.ToString()) && e.Row.Cells[9].Text!=" ")
            {
                Decimal sum4 = decimal.Parse(e.Row.Cells[9].Text.ToString());
                mysum6 = mysum6 + sum4;
            }
            if (!string.IsNullOrEmpty(e.Row.Cells[10].Text.ToString()) && e.Row.Cells[10].Text.ToString() != " ")
            {
                Decimal sum5 = decimal.Parse(e.Row.Cells[10].Text.ToString());
                mysum7 = mysum7 + sum5;
            }
          
            
        }
        if (e.Row.RowType == DataControlRowType.Footer)
        {
            e.Row.Cells[0].Text = "<span align='center' style='color:red'>合计:</span>";
            e.Row.Cells[6].Text ="<span align='center' style='color:red'>"+ mysum3.ToString()+"</span>";
            e.Row.Cells[7].Text = "<span align='center' style='color:red'>" + mysum4.ToString() + "</span>";
            e.Row.Cells[8].Text = "<span align='center' style='color:red'>" + mysum5.ToString() + "</span>";
            e.Row.Cells[9].Text = "<span align='center' style='color:red'>" + mysum6.ToString() + "</span>";
            e.Row.Cells[10].Text = "<span align='center' style='color:red'>" + mysum7.ToString() + "</span>";
        }

    }