[英]Add column to datatable and bind it in grid
I have a gridview with property autogeneratecolumn=true
and my DataTable is filling the data as mentioned below using mdx query. 我有一个属性为
autogeneratecolumn=true
的gridview,我的DataTable正在使用mdx查询填充数据,如下所述。
sales2015 sales2014
1256 1235
3569 0
0 1235
i want to add another column named "VARIENT" and need to show the percentages in the same. 我想添加一个名为“ VARIENT”的列,并需要在同一列中显示百分比。
Formula:
(sales2015 - sales2014)/sales2015 * 100
公式:
(sales2015 - sales2014)/sales2015 * 100
Need to calulate each row for the datatable using same formula and bind to gridview. 需要使用相同的公式计算数据表的每一行并绑定到gridview。
please help me with the logic. 请帮助我的逻辑。
Note : my grid is having autogenerated columns
注意:我的网格具有自动生成的列
expected result is like this 预期的结果是这样的
sales2015 sales2014 Varient
1256 1235 **%
3569 0 **%
0 1235 **%
My Code part is: 我的代码部分是:
System.Data.DataTable dt = new System.Data.DataTable();
ViewData1 vData = new ViewData1();
dt = vData .__getCustomerSource()// Here in this function i was filling the datatable and returing
DataGrid1.DataSource = null;
DataGrid1.DataSource = dt;
DataGrid1.DataBind();
You can create the third column on the fly and populate it like this:- 您可以动态创建第三列,并按以下方式填充它:-
dt = vData .__getCustomerSource()
dt.Columns.Add("Varient", typeof(string));
foreach (DataRow row in dt.Rows)
{
row["Varient"] = String.Format("{0} %", ((row.Field<int>("sales2015") -
row.Field<int>("sales2014")) / row.Field<int>("sales2015")) * 100);
}
DataGrid1.DataSource = dt;
DataGrid1.DataBind();
You need to change your formula accordingly. 您需要相应地更改公式。
Update: 更新:
If your column names will be changing then you can make use of column index (but as you know it may fail if your datatable structure change dynamically) like this:- 如果您的列名将要更改,则可以使用列索引(但是,您知道如果数据表结构动态更改,列索引可能会失败),如下所示:
(int)row.[1] - (int)row[2]
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