Using Strings-Validate

Verify Numeric Value

Convert string to value without erroring on fail

	//Try and convert without checking result
	int.TryParse(MyStringValue, out Value);		//Value will be set to 0 if conversion fails

	//Convert and get result if it worked or not
	if (int.TryParse(MyStringValue, out Value))	//Returns true if conversion sucessful
	{
		//Conversion was sucessful
	}

For larger values:

    UInt64 Value = 123;
    ValueIsNumeric = UInt64.TryParse(MyStringValue, out Value);		//Value will be set to 0 if conversion fails

Verifying a form TextBox value example


    //*****************************************************
    //*****************************************************
    //*********** VERIFY NUMBERIC TEXT BOX VALUE **********
    //*****************************************************
    //*****************************************************
    private void VerifyTextBoxNumericValue(ref TextBox TextBox1, int MinValue, int MaxValue, int DefaultValue)
    {
        try
        {
            int Value = 0;
            if (!(int.TryParse(TextBox1.Text, out Value)))
            {
                TextBox1.Text = Convert.ToString(DefaultValue);
            }

            if (Value < MinValue)
                TextBox1.Text = Convert.ToString(MinValue);
            if (Value > MaxValue)
                TextBox1.Text = Convert.ToString(MaxValue);
        }
        catch (Exception)
        {
        }
    }


    VerifyTextBoxNumericValue(ref MyTextBox, 0, 256, 256);

Verify a byte array contains only ASCII characters

Skips the first 5 bytes, tests the rest

						bool IsAscii = RxData.Skip(5).Take(Rs485FeedReceivedPacketLength).All(b => (b >= ' ' && b <= '~') || b == '\r' || b == '\n');	//Check the data is all ascii characters
						if (!IsAscii)
							break;
						sTemp = "";
						sTemp = System.Text.Encoding.UTF8.GetString(RxData, 5, Rs485FeedReceivedPacketLength);