index was outside the bounds of the array meaning WPF C# -

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• what indexoutofrangeexception / argumentoutofrangeexception , how fix it? 2 answers

i try code display names database in loop shows error index outside bounds of array meaning on line name[j++] = convert.tostring(reader["categoryname"]);

code

 con.open();         int count =0;         int j =0;         //cmd = new sqlcommand("select * category");         string[] name = new string[count];         cmd = new sqlcommand("select categoryname category",con);         reader = cmd.executereader();         while (reader.read())         {             name[j++] = convert.tostring(reader["categoryname"]);         }         int loc = 37;         checkbox[] obj = new checkbox[count];         (int = 0; < count; i++)         {             obj[i] = new checkbox();             obj[i].location = new system.drawing.point(loc, 50);             obj[i].size = new system.drawing.size(80, 17);             obj[i].text = name[i];             this.controls.add(obj[i]);             loc += 80;          }         con.close(); 

any help?

well set count = 0 create array

string[] name = new string[count]; 

which means array of 0 lenght , won't able assign it. suggest change list easier

list<string> name = new list<string>();  while (reader.read()) {     name.add(convert.tostring(reader["categoryname"])); }