Question

我想用DataTable填充从变量中获取的值。我在c＃中编码。我有一个名为DataTable的摘要，我创建了列，我需要为变量average，remaining_share，sales_proceed，cost_sale添加值，realized_profit。

代码如下：

protected void Button1_Click(object sender, EventArgs e)
{
    average = 25;
    remaining_share = 30;
    sales_proceed = 125;
    cost_sale = 50;
    realized_profit = 33;
    var dataTablesummary = new DataTable();
    dataTablesummary.Columns.Add("average", typeof(decimal));
    dataTablesummary.Columns.Add("Remaining share", typeof(decimal));
    dataTablesummary.Columns.Add("sales_proceed", typeof(decimal));
    dataTablesummary.Columns.Add("cost_sale", typeof(decimal));
    dataTablesummary.Columns.Add("realized_profit", typeof(decimal));
}

我想在点击按钮时向DataTable添加值，请告诉我们如何操作。

Answer 1

考虑average, remaining_share, sales_proceed, cost_sale, realized_profit是要插入行的变量，以下行

dataTablesummary.Rows.Add(average, remaining_share, sales_proceed, cost_sale, realized_profit);

会这样做。

protected void Button1_Click(object sender, EventArgs e)
{
    average = 25;
    remaining_share = 30;
    sales_proceed = 125;
    cost_sale = 50;
    realized_profit = 33;
    var dataTablesummary = new DataTable();
    dataTablesummary.Columns.Add("average", typeof(decimal));
    dataTablesummary.Columns.Add("Remaining share", typeof(decimal));     dataTablesummary.Columns.Add("sales_proceed", typeof(decimal));
    dataTablesummary.Columns.Add("cost_sale", typeof(decimal));
    dataTablesummary.Columns.Add("realized_profit", typeof(decimal));
    dataTablesummary.Rows.Add(average, remaining_share, sales_proceed, cost_sale, realized_profit);
}

Answer 2

您必须使用dataTablesummary为dataTablesummary.NewRow();创建新行，然后为新创建的行指定值。然后将此行添加到数据表：

 var dr = dataTablesummary.NewRow();
 dr["average"] = average;
 dr["Remaining share"] = remaining_share;
 dr["cost_sale"] = sales_proceed;
 dr["realized_profit"] = realized_profit;
 dataTablesummary.Rows.Add(dr);

Answer 3

//Create a datarow of type dataTablesummary
DataRow dr=dataTablesummary.NewRow();    
//can be populated by methods like:
dr["average"] = 1.2;
dr["Remaining share"] = 5.7
dr["cost_sale"] = 5.4;
dr["realized_profit"] = 1.78;    
//Now add the row to datatable
dataTablesummary.Rows.Add(dr);

您可以用变量替换数字

Answer 4

你需要调用datable实例的newrow（）。它返回一个数据行实例，其行具有与该表相同的单元格数。现在你可以像我这样绑定数据了。

 DataRow dr=dataTablesummary.NewRow();
 dr["average"] = average;
 dr["Remaining share"] = remaining_share;
 dr["cost_sale"] = sales_proceed;
 dr["realized_profit"] = realized_profit;
 dataTablesummary.Rows.Add(dr);

如果colomn名字你不知道你可以像

那样写

 DataRow dr=dataTablesummary.NewRow();
 dr[0] = average;
 dr[1] = remaining_share;
 dr[2] = sales_proceed;
 dr[3] = realized_profit;
 dataTablesummary.Rows.Add(dr);

如何将数据从变量插入数据表中

4 个答案: