请参阅: http: //www.codeproject.com/Articles/13338/Check-If-A-String-Value-Is-Numeric
public bool isNumeric(string val, System.Globalization.NumberStyles NumberStyle)
{
Double result;
return Double.TryParse(val,NumberStyle,
System.Globalization.CultureInfo.CurrentCulture,out result);
}
编辑:
用法
private void saveAndExitBtn_Click(object sender, EventArgs e)
{
if (!isNumeric(custZipField.Text, System.Globalization.NumberStyles.Integer))
{
MessageBox.Show("Please enter a valid post code", "Unable to save", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
return;
}
if (String.IsNullOrEmpty(custNameField.Text) || String.IsNullOrEmpty(custAddressField.Text) ||
String.IsNullOrEmpty(custZipField.Text) || String.IsNullOrEmpty(custStateField.Text) ||
String.IsNullOrEmpty(custAgeField.Text))
{
MessageBox.Show("Please complete the entire form", "Unable to save", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
return;
}
//save the data
saveNewCustomerInfo();
//next, retrieve the hidden form's memory address
Form myParentForm = CustomerAppStart.getParentForm();
//now that we have the address use it to display the parentForm
myParentForm.Show();
//Finally close this form
this.Close();
}//end saveAndExitBtn_Click method
public bool isNumeric(string val, System.Globalization.NumberStyles NumberStyle)
{
Double result;
return Double.TryParse(val, NumberStyle,
System.Globalization.CultureInfo.CurrentCulture, out result);
}