getting datagridview last row index

Question

i'm trying to get the last row but the problem is....see my code

Int32 index=dataGridveiw1.Rows.Count; // this is count start 1,2,3,4,5,6

sum3=txt_lotweight.Text-txt_balanceweight.Text;
sum4=datagridview1.Rows[index].Cells["rollweight"].Value-sum3;

how to minus gridview last row value to sum3 in this code error will come rows index not found because rows count start from 1 and when i subtract rows value to sum3 its start from 0

so how to get last row of gridview

Answer 1

You are not getting last row index, but count that is higher by 1 than last index! That is because array indexing in C# starts from 0.

Int32 index = dataGridveiw1.Rows.Count - 1; // this is count start 1,2,3,4,5,6

this code will work. But I have doubts about your sum3 - if your TextBox contains integers you should cast it to int before subtracting, and Value in sum4 is object so casting is required as well.

Answer 2

Index are basically starts from 0 so if you are using the row count then you have to use it like this to get the last index.

Int32 index=dataGridveiw1.Rows.Count - 1 ;