How can i write a datagrid to a textfile in WPF?

Question

How can i write all my values in my datagrid not datagridview in a textfile i have the following code but it only saves the last values and not every value in the datagrid

my code

string file_name = "text.txt";

for (int i = 0; i < datagrid.Items.Count; i++)
{ 
    //this is the class person
    Person prsn = (Person)datagrid.Items[i];
    File.WriteAllText(file_name, person.ToString());
}

How can i fix this?

Answer 1

File.WriteAllText writes the data in your file but when the loop increments, that data is overwritten. This goes on till the last loop and that's why you see only the last one in the file.

You need to hold the previous data and should write in file only when the loop is complete.

So do this

string file_name = "text.txt";
StringBuilder strBuilder = new StringBuilder():

for (int i = 0; i < datagrid.Items.Count; i++)
{
    Person prsn = (Person)datagrid.Items[i];
    strBuilder.Append(prsn.ToString());
}
File.WriteAllText(file_name, strBuilder.ToString());