Wednesday, June 6, 2012

How to convert DataTable to HTML Table?


Asp.Net provides different data controls to display data on page but in some cases if you don't want to use those controls then we can simply use Custom table to display data on page. Here I am explaining, How we can convert DataTable (data source) to HTML table?


Asp.Net provides classes like Table, TableRow, TableCell to create table using code, we can easily create table using these classes and we can display data in created table. In this example, I have Used Table, TableRow, TableCell Classes to create Table.

Here is code-

protected void btnGetData_Click(object sender, EventArgs e)
    {
        //Code to get data from database
        SqlConnection cn = new SqlConnection("Connection string");
        cn.Open();
        DataTable dt = new DataTable();
        SqlDataAdapter da = new SqlDataAdapter("select ID,Name from tabEmployee", cn);
        da.Fill(dt);
      
        //Code to show Data table’s data to HTML table
        Table tbl = new Table();
        tbl.CellPadding = 0;
        tbl.CellSpacing = 0;

       //Flag to add Header for HTML table
        bool AddedColumnName = false;

        //Looping for getting Data table’s data
        foreach (DataRow dtRow in dt.Rows)
        {
            TableRow row = new TableRow();
            foreach (DataColumn col in dt.Columns)
            {
                //Adding heading to HTML table
                if (AddedColumnName == false)
                {
                    TableCell cell = new TableCell();
                    cell.BorderStyle = BorderStyle.Solid;
                    cell.BorderWidth = 2;
                    cell.BorderColor = System.Drawing.Color.Gray;
                    cell.BackColor = System.Drawing.Color.Green;
                    cell.ForeColor = System.Drawing.Color.White;
                    cell.HorizontalAlign = HorizontalAlign.Center;
                    cell.Text = col.ColumnName;
                    row.Cells.Add(cell);
                }
                //Adding data to HTML table
                else
                {
                    TableCell cell = new TableCell();
                    cell.BorderStyle = BorderStyle.Solid;
                    cell.BorderWidth = 2;
                    cell.BorderColor = System.Drawing.Color.Gray;
                    cell.Text = dtRow[col].ToString();
                    row.Cells.Add(cell);
                }
            }

            tbl.Rows.Add(row);
            AddedColumnName = true;
        }

        //Adding created HTML table to Panel control
        pnlData.Controls.Add(tbl);
    }


In this code, I have read data from database and stored on one data source- DataTable.
Now using looping, I have iterated all the data to create HTML table. First I am creating header for the table, for this I have written code like this- 


//Adding heading to HTML table
                if (AddedColumnName == false)
                {
                    TableCell cell = new TableCell();
                    cell.BorderStyle = BorderStyle.Solid;
                    cell.BorderWidth = 2;
                    cell.BorderColor = System.Drawing.Color.Gray;
                    cell.BackColor = System.Drawing.Color.Green;
                    cell.ForeColor = System.Drawing.Color.White;
                    cell.HorizontalAlign = HorizontalAlign.Center;
                    cell.Text = col.ColumnName;
                    row.Cells.Add(cell);
                }


This line of code will add header to the table by getting column names from result set, These column names cab be changed in select query.

Now to add data of result set I have used this code- 

//Adding data to HTML table
                else
                {
                    TableCell cell = new TableCell();
                    cell.BorderStyle = BorderStyle.Solid;
                    cell.BorderWidth = 2;
                    cell.BorderColor = System.Drawing.Color.Gray;
                    cell.Text = dtRow[col].ToString();
                    row.Cells.Add(cell);
                }


This code will be executed for each row in result set except header row. For creating HTML table, I have used Table, TableRow and TableCell classes, in foreach loop for every row in DataTable I am creating object for TableRow class and for every column object for TableCell class.

To add data to HTML Table cell using this code-

row.Cells.Add(cell);

Here "row" is object of TableRow and "cell" is object of TableCell class.
 
Output-



DataTable to HTML Table


Thanks

1 comment:

  1. The GridView .WinForms control can easily export GridView data to HTML to viewing in a web browser.

    ReplyDelete