How to Edit a row in the datatable

Question

I have created a data table. It has 3 column Product_id, Product_name and Product_price

    Datatable tabl         


        

Answer 1

If your data set is too large first select required rows by Select(). it will stop further looping.

DataRow[] selected = table.Select("Product_id = 2")

Then loop through subset and update

    foreach (DataRow row in selected)
    {
        row["Product_price"] = "<new price>";
    }

Answer 2

You can traverse through the DataTable like below and set the value

foreach(DataTable thisTable in dataSet.Tables)
{
    foreach(DataRow row in thisTable.Rows)
    {
        row["Product_name"] = "cde";
    }
}

OR

thisTable.Rows[1]["Product_name"] = "cde";

Hope this helps

Answer 3

First you need to find a row with id == 2 then change the name so:

foreach(DataRow dr in table.Rows) // search whole table
{
    if(dr["Product_id"] == 2) // if id==2
    {
        dr["Product_name"] = "cde"; //change the name
        //break; break or not depending on you
    }
}

You could also try these solutions:

table.Rows[1]["Product_name"] = "cde" // not recommended as it selects 2nd row as I know that it has id 2

Or:

DataRow dr = table.Select("Product_id=2").FirstOrDefault(); // finds all rows with id==2 and selects first or null if haven't found any
if(dr != null)
{
    dr["Product_name"] = "cde"; //changes the Product_name
}

Answer 4

You can find that row with

DataRow row = table.Select("Product_id=2").FirstOrDefault();

and update it

row["Product_name"] = "cde";

Answer 5

Try this I am also not 100 % sure

        for( int i = 0 ;i< dt.Rows.Count; i++)
        {
           If(dt.Rows[i].Product_id == 2)
           {
              dt.Rows[i].Columns["Product_name"].ColumnName = "cde";
           }
        }

Answer 6

Try the SetField method:

By passing column object :

table.Rows[rowIndex].SetField(column, value);

By Passing column index :

table.Rows[rowIndex].SetField(0 /*column index*/, value);

By Passing column name as string :

table.Rows[rowIndex].SetField("product_name" /*columnName*/, value);