How to convert string in text box to an array

There are two ways: Split[^] and ToCharArray[^]
The former returns an array of strings, which were separated by a character - CSV for example:

string myString = "123,456,789";
string[] parts = myString.Split(',');

Would return three strings, "123", "456", and "789".
The latter would give you an array of each character:

string myString = "123,456,789";
char[] chars = myString.ToCharArray();

Alternatively, you can use the string as an array of chars directly:

string myString = "123,456,789";
char c = myString[2];

would give you the character '3'

Try that

TextBox1.Text.ToCharArray()

char[] myArray = myTextBox.Text.ToArray<char>();

//same thing, would work with C# 2.0:
myArray = myTextBox.Text.ToCharArray();

Why doing so?!

—SA

You can do this way:

string myString = textbox1.text;
string[] myArray= new string[myString.Length];
for(int i = 0; i<myString.Length; i++){
myArray[i] = myString[i].ToString();
}

hope this helps :)

string mys = textBox1.Text;
string[] myarr = new string[mys.Length];
for (int z = 0; z < mys.Length; z++)
{
myarr[z] = mys[z].ToString();
}
int count=0;

for (int i = 0; i <= 3; i++)
{
string c = myarr[i].ToUpper();
if (myarr[i] == c)
{
count++;
}
}
MessageBox.Show("Count=" + count + "");

Hope this helps...