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POValidation in ASP.NET with Getter & Setter
 

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  1. POValidation in ASP.NET with Getter & Setter
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    <p>I am trying to do a validation when user input is correct, I used a label with black text to display. On the contrary, when user input is incorrect, I display the error message in another label with red text in ASP.NET. It's a 3 tier program. Here is the codes in my presentation layer:</p> <pre><code> protected void btn_submit_Click(object sender, EventArgs e) { ToolsBLL calcBMI = new ToolsBLL(); lbl_result.Text = ""; lbl_invalid.Text = ""; if (calcBMI.Valid == true) { lbl_result.Text = calcBMI.calcBMI(tb_height.Text, tb_weight.Text); } else if (calcBMI.Valid == false) { lbl_invalid.Text = calcBMI.calcBMI(tb_height.Text, tb_weight.Text); } } </code></pre> <p>It will call the getter and setter which named Valid in BusinessLogicLayer to check whether the input is valid. And here is the codes in my BusinessLogicLayer:</p> <pre><code> public static Boolean valid; public Boolean Valid { get { return valid; } set { valid = value; } } public string calcBMI(string sheight, string sweight) { decimal height = 0; decimal weight = 0; string bmiResultDesc = ""; decimal bmi = 0; ToolsBLL.valid = true; if (sheight == "" &amp;&amp; sweight == "") { ToolsBLL.valid = false; bmiResultDesc = "Height/Weight cannot be blank."; } else { try { height = decimal.Parse(sheight); weight = decimal.Parse(sweight); } catch { ToolsBLL.valid = false; bmiResultDesc = "Height/Weight must be in numeric."; } } if (bmiResultDesc == "") { if (height &lt;= 0) { ToolsBLL.valid = false; bmiResultDesc = "Invalid height"; } else if (weight &lt;= 0) { ToolsBLL.valid = false; bmiResultDesc = "Invalid weight"; } else { BMICalculator.BMICalculator bmiCalc = new BMICalculator.BMICalculator(); bmi = bmiCalc.computeBMI(height, weight); if (bmi &lt;= 0) { ToolsBLL.valid = false; bmiResultDesc = "Error in consuming web services."; } else { ToolsBLL.valid = true; bmiResultDesc = "Your BMI is " + bmi.ToString(); } } } return bmiResultDesc; } </code></pre> <p>I used a getter and setter to set for value for boolean. I am not sure if I am doing in the correct way or not because my BMICalculator behaves strange. For example, when I type in correct input, sometimes it shows in black but sometimes it shows in red. I have no idea why is it so.</p> <p>Thanks in advance.</p>
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