I have a gridview that contains a count (whic is Quantity) were i have a button that adds a row under the orginal row and i need the sub row's count (Quantity) to subtract one from the orgianl row Quantity.
EX: Before button click
Orgianl row = 3
After click
Orginal row = 2
Subrow = 1
Code:
ASP.NET




// FUNCTION : Adds a new subrow
protected void gvParent_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName.Equals("btn_AddRow", StringComparison.OrdinalIgnoreCase))
{
// Get the row that was clicked (index 0. Meaning that 0 is 1, 1 is 2 and so on)
// Objects can be null, Int32s cannot not.
// Int16 = 2 bytes long (short)
// Int32 = 4 bytes long (int)
// Int64 = 8 bytes long (long)
int i = Convert.ToInt32(e.CommandArgument);

// create a DataTable based off the view state
DataTable dataTable = (DataTable)ViewState["gvParent"];

for (int part = 0; part < dataTable.Rows.Count; part++) { int oldQuantity = Convert.ToInt32(dataTable.Rows[i]["Quantity"]); string partNumber = dataTable.Rows[i]["ProductDescription"].ToString(); string description = dataTable.Rows[i]["Description"].ToString(); string dateOrdered = dataTable.Rows[i]["GTRI_DateSubmittedtoPurchasing"].ToString(); string estShipDate = dataTable.Rows[i]["Gtri_EstShipDate"].ToString(); string actualShipDate = dataTable.Rows[i]["Gtri_ActualShipDate"].ToString(); string trackingNumb = dataTable.Rows[i]["GTRI_TrackingNumbers"].ToString(); string serialNumb = dataTable.Rows[i]["Gtri_SerialNumber"].ToString(); int oldQuantitySubtract = Convert.ToInt32(dataTable.Rows[part]["Quantity"]); string curentPartNumbers = dataTable.Rows[part]["ProductDescription"].ToString(); string currentDescription = dataTable.Rows[part]["Description"].ToString(); string currentDateOrdered = dataTable.Rows[part]["GTRI_DateSubmittedtoPurchasing"].ToString(); string currentEstShipDate = dataTable.Rows[part]["Gtri_EstShipDate"].ToString(); string currentActualShipDate = dataTable.Rows[part]["Gtri_ActualShipDate"].ToString(); string currentTrackingNumb = dataTable.Rows[part]["GTRI_TrackingNumbers"].ToString(); string currentSerialNumb = dataTable.Rows[part]["Gtri_SerialNumber"].ToString(); if (partNumber.Equals(curentPartNumbers, StringComparison.OrdinalIgnoreCase) && oldQuantitySubtract > 1)
{
dataTable.Rows[part]["Quantity"] = oldQuantitySubtract - 1;

// Instert a new row at a specific index
DataRow dtAdd = dataTable.NewRow();

for (int k = 0; k < dataTable.Columns.Count; k++)

dtAdd[k] = dataTable.Rows[part][k];
dataTable.Rows.InsertAt(dtAdd, i + 1);

break;

//dataTable.Rows.Add(dtAdd);
}
}
// Rebind the data
gvParent.DataSource = dataTable;
gvParent.DataBind();
}
}