how to decrease the textbox value after insert something inthat text box

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i have a text box and a boton when i insert some int in the text box and the value is below 100 after clicking the button again i can insert some value there this value sholu below 100 and the summetion of the 2 value should not be greter than 100 ,unless the total value goes to 100 he can enter the values

Posted 1-Nov-15 20:20pm

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PANKAJMAURYA · Answer 1 · 2015-11-01T20:43:00

Try this solution
Write below code on your code page

C#

private static int sum = 0;
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            sum = 0;
        }
    }

    protected void BtnGO_Click(object sender, EventArgs e)
    {
        if ((sum + Convert.ToInt16(txtInput.Text)) == 100)
        {
            sum = sum + Convert.ToInt16(txtInput.Text);
            txtInput.Enabled = false;
            lblMessage.Text = "Great ! Sum is 100 now";
        }
        else if ((sum + Convert.ToInt16(txtInput.Text)) > 100)
        {
            lblMessage.Text = "Sum exceeds 100 try to enter lower value";
        }
        else
        {
            sum = sum + Convert.ToInt16(txtInput.Text);
            txtInput.Text = string.Empty;
            lblMessage.Text = "Sum is " + sum + ". Still below 100 enter some more value to make 100";
        }
    }

Write below code in your source page

ASP.NET

<asp:textbox id="txtInput" runat="server"  />
        <asp:button id="BtnGO" runat="server" text="Add Value" onclick="BtnGO_Click" />
        <asp:label id="lblMessage" runat="server" />

PANKAJMAURYA · Answer 2 · 2015-11-01T21:31:00

You can use Jquery Also for that

C#

$(document).ready(function () {
           $("#BtnGO").click(function () {
               var sum = parseInt($("#HFSum").val());
               var input = parseInt($("#txtInput").val());
               if (sum + input == 100) {
                   $("#lblMessage").text("Great ! sum is 100 now");
               }
               else if ((sum + input) > 100) {
                   $("#lblMessage").text("Sum exceeds 100 try to enter less value");
               }
               else {
                   $("#HFSum").val(sum + input);
                   $("#lblMessage").text("Sum is " + $("#HFSum").val() + " still below 100 enter more value to make 100");
                   $("#txtInput").val('');
               }
           });

       });

Source Code

XML

<asp:TextBox id="txtInput" runat="server"  />
     <asp:Button id="BtnGO" runat="server" text="Add Value" />
       <asp:HiddenField ID="HFSum" runat="server" Value="0" />
     <asp:Label id="lblMessage" runat="server" />

how to decrease the textbox value after insert something inthat text box

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