gridview not adding multiple rows

Question

0.00/5 (No votes)

See more:

C#

DataTable dt = new DataTable();
            DataRow dr = dt.NewRow();
            DataColumn col = new DataColumn(); ;
            col = new DataColumn("col1");
            dt.Columns.Add(col);
            col = new DataColumn("col2");
            dt.Columns.Add(col);
            col = new DataColumn("col3");
            dt.Columns.Add(col);
            col = new DataColumn("col4");
            dt.Columns.Add(col);
            dr["col1"] = this.drpdwnmedicine_name.SelectedValue;
            dr["col2"] = this.drpdwnmanufacturer_name.SelectedValue;
            dr["col3"] = this.dosage.Value;
            dr["col4"] = this.quantity.Value;
            dt.Rows.Add(dr);
            //dt.AcceptChanges();
 
            displaycartgridview.DataSource = dt;
            displaycartgridview.DataBind();

dear everyone...
the above code works fine..but it s not adding multiple rows..only one row it s creating ..then if we add one more row it is replacing old rows..so pls help me to come out from this

Posted 17-Aug-11 21:26pm

Iam Velu

Updated 17-Aug-11 21:29pm

Prerak Patel

v2

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

kornakar · Answer 1 · 2011-08-17T21:59:00

Solution 1

Here you create a new data table every time this method is called, so all rows are lost.

DataTable dt = new DataTable();

You should separate the table creation and row adding to different methods so that the table is created once and then the rows are added to it.

Posted 17-Aug-11 21:59pm

kornakar

Raju Prajapati · Answer 2 · 2011-08-17T22:04:00

make a loop for the no. of rows you want to add in the loop put the codes like

DataRow dr = dt.NewRow();
dr["col1"] = this.drpdwnmedicine_name.SelectedValue;
dr["col2"] = this.drpdwnmanufacturer_name.SelectedValue;
dr["col3"] = this.dosage.Value;
dr["col4"] = this.quantity.Value;
dt.Rows.Add(dr);

and bind the gridview outside the loop after filling the datatable

hope this will help