i am having an error to a code that i was practicing online, i actually copy codes from someone to practice and see the output

Question

here is the code

public static void LoadData(string qry, DataGridView gv, ListBox lb)
{
//serial no in gridview

gv. CellFormatting += new DataGridViewCellFormattingEventHandler(gv_CellFormatting);

try
{
SqlCommand cmd = new SqlCommand(qry, con);
cmd. CommandType = CommandType. Text
SqlDataAdapter sda = new SqlDataAdapter(cmd) ;
DataTable dt = new DataTable() ;
da. Fill(dt);

for(int i = 0; i < lb. Items. Count; i++)
{
string colNam1 = ((DataGridView) lb. Items[i].ToString()
}

gv. DataSource = dt;

}
catch (Exception ex)
{
MessageBox. Show(ex.ToString()) ;
con. Close() ;
}

}

i just copy the code to someone but while watching it they didn't encounter error on that part but I do so idk what to do should i link something? thank u for help :)

Answer 1

mira
There are a few syntax errors in the code.Here are modified versions

See this thread and learn what is your mistake..
https://code.sololearn.com/c7kcE6bINn3t/?ref=app

Answer 2

What programming language is this? I can only understand python,c++,is,html

Answer 3

c# in visual studio

Answer 4

Darpan kesharwani
thank u very much for the help i really appreciate it :)