Subtract a gridview textbox value from another textbox

Larry

Hi,

I have a gridview that contains a TemplateField TextBox, labeled txtGvBox1, another Template Field that contains a checkbox labeled CheckBox1. Now within my form I have a TextBox labeled txtDelta that is not in the Gridview. This textbox contains a value that comes from the db. My goal is that when a user enters a value into the Gridview Textbox (txtGvBox1) and checks the checkbox, that that value is subtracted from the txtDelta textbox. Can someone give me an example of how I would do that. FYI I'm just learning to develop in C#.

Any help would be much appreciated

4 Replies

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Larry13y ago
Sorry my earlier explanation wasn't that clear, so here is the text box div as well as my gridview, sorry its a bit long. As you can see I have a textbox called txtDelta, not part of the Gridview. This text box is will contain a value that comes from a SQL Database. The Gridview is bound to the same SQL db with the exception of a textbox "txtBox1" in each row of data in the Gridview below.What I need is that when a user inputs a value in the Gridview textbox it subtracts that number from the value in the txtDelta textbox, which again is not in the Gridview. Thanks again for the help


                    CssClass="contentTextBox" ReadOnly="True" />








Current Inventory



                    BackColor="White" BorderColor="#999999" BorderStyle="None" BorderWidth="1px"
            CellPadding="3" GridLines="Vertical"
            Width="900px" AllowPaging="True" AllowSorting="True" ShowFooter="True"
            DataSourceID="SqlDataSource3">


                                    SortExpression="InstrumentTypeID" Visible="False">




                                                    Text='<%# Bind("InstrumentTypeID") %>'>


                                    SortExpression="TypeName" />
                                    SortExpression="VintageYear" ItemStyle-HorizontalAlign="Center" >


                                    ReadOnly="True" SortExpression="StartSerial"
                    ItemStyle-HorizontalAlign="Center" >


                                    SortExpression="EndSerial" ItemStyle-HorizontalAlign="Center" >


                                    ReadOnly="True" SortExpression="RemainingTonnes" ItemStyle-Width="125px"
                    ItemStyle-HorizontalAlign="Center" >


                                    ItemStyle-HorizontalAlign="Center" >

                        txtBox1" runat="server" Width="100px"
AutoPostBack="True">
Larry13y ago
Hi Pankaj, Thanks for the reply, I actaully want to subtract the textbox value within the GridView from a value that is in a Textbox that is not in the Gridview.
Vishal Gilbile13y ago
Hello Friend,
You could easily do it through javascript or through code behind.

The Better approach would be to make use of CodeBehind. What you can do is try to provide a CommandName to your Checkbox inside Gridview and in the GridView_RowCommand event write the following code. Let's assume you provide a CommandName as "CheckMe"

protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
if(e.CommandName.Equals("CheckMe"))
{
int rowIndex = ((GridViewRow)((CheckBox)sender).NamingContainer).RowIndex;

//Now once you got the row index whose CheckBox is checked. You could Easily //find the control whose value you need to read. For instance the textbox whose value //you need to read lies on 2 column of gridview and its id is txtDelta.

TextBox txt=(TextBox)gridview1.Rows[rowIndex].Cells[2].FindControl("txtDelta");

//here your find the value of txtDelta textbox in your txt Textbox. and rest calculation //part you could easily do it.

}
}

Hope that solves your problem.

With Regards,
Vishal Gilbile
Pankaj Rawat13y ago
create checkbox CheckedChange Event.
Grid ID= "gridview1"
textBox 1 ID= "txtfirstnumber";
textbox 2 ID= "txtSecondNumber";

Protected Void chkSelected_CheckedChange(object sender,EventArgs)
{
Checkbox chknew=(Checkbox)sender;
GridviewRow newrow=(GridviewRow)chknew.NamingContainer;
int Row_ID=newrow.RowIndex;
TextBox txt1=(TextBox)gridview1.Rows[Row_ID].FindControl("txtfirstnumber);
   TextBox txt2=(TextBox)gridview1.Rows[Row_ID].FindControl("txtSecondNumber);

/* IF Checked */
if(chknew.Checked==True)
{
          int First_Number=Convert.ToInt32(txt1.Text);
          int Second_Number=Convert.ToInt32(txt2.Text);
        int Result=First_Number+Second_Number;
}
}

Subtract a gridview textbox value from another textbox

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