Question

这是我到目前为止的代码，基本上它获取了uniqueid的实际值，并将其用作每个系列的值：

string[] XPointMember = new string[table.Rows.Count];
int[] YPointMember = new int[table.Rows.Count];

for (int count = 0; count < table.Rows.Count; count++)
{                 
    XPointMember[count] = table.Rows[count]["GuitarBrand"].ToString();

    YPointMember[count] = Convert.ToInt32(table.Rows[count]["UniqueID"]);
}
//binding chart control  
chart1.Series[0].Points.DataBindXY(XPointMember, YPointMember);

我想要完成的是添加该吉他品牌的每个实例的数量以显示为价值。因此，如果特定GuitarBrand有4个实例，则该值应为4。

谢谢！

Answer 1

这应该这样做：

//First populate the X axis only (the series)
for (int index = 0; index < table.Rows.Count; index++)
{
    XPointMember[index] = table.Rows[index]["GuitarBrand"].ToString();
}

//Loop again, and for each series, use the Count method
//to see how much occurrences of the same guitar brand are there
for (int index = 0; index < table.Rows.Count; index++)
{
    var guitar_brand = XPointMember[index];

    YPointMember[index] = XPointMember.Count(x => x == guitar_brand);
}

请注意，我使用index代替count作为循环变量。在这里使用count会让代码的读者感到困惑。

将每个Series intance的计数用作Y值

1 个答案: