Dynamic template field in grdivew post back values - asp.net

Question

//Bedlow is the page_load code to add dynamic controls in page load. and load of page_load
gvSecond 's dynamic template fields will be added.I want to know why the dot is appended on each postback values
protected void Page_Load(object sender, EventArgs e)
{
gvFirst.DataSource = GetData("select top 10 * from Project_Master");
gvFirst.DataBind();
}
//gvFirst has gvSecond and on rowdatabound of the gvFirst gvSecond populated with dynamic template fields. and all the template fields has the TextBoxtes in it
protected void gvFirst_OnRowDataBound(object sender, GridViewRowEventArgs e)
{
//below code to generate dynamic template column
gvFirst.DataSource = GetData("select top 10 * from Project_Master");
gvFirst.DataBind();
//Added dynamic controls in gvSecond
protected void gvFirst_OnRowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
string customerId = gvFirst.DataKeys[e.Row.RowIndex].Value.ToString();
GridView gvSecond = e.Row.FindControl("gvSecond") as GridView;
DataTable dt= GetData1(Convert.ToInt32(customerId));
foreach (DataColumn col in dt.Columns)
{
//Declare the bound field and allocate memory for the bound field.
TemplateField bfield = new TemplateField();
//Initalize the DataField value.
bfield.HeaderTemplate = new GridViewTemplate(ListItemType.Header, col.ColumnName);
//Initialize the HeaderText field value.
bfield.ItemTemplate = new GridViewTemplate(ListItemType.Item, col.ColumnName);
//Add the newly created bound field to the GridView.
gvSecond.Columns.Add(bfield);
}
TotalColumns = dt.Columns.Count;
gvSecond.DataSource = dt;
gvSecond.DataBind();
}
}
}
//This is used to add the dynamic template in gvSecond.Now when I click on button textbox values appended with postback values and older values seperated by dot(.)

Answer 1

You need to wrap the code in Page_Load in if(!IsPostback){}:
EDIT :
Edited to create second grid at postback.
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
gvFirst.DataSource = GetData("select top 10 * from Project_Master");
gvFirst.DataBind();
}
else
{
CreateSecondGridView();
}
}
And your Rowdatabound may look like this:
protected void gvFirst_OnRowDataBound(object sender, GridViewRowEventArgs e)
{
CreateSecondGridView();
}
protected void CreateSecondGridView()
{
foreach(GridViewRow row in gvFirst.Rows)
{
if (row.RowType == DataControlRowType.DataRow)
{
string customerId = gvFirst.DataKeys[row.RowIndex].Value.ToString();
GridView gvSecond = row.FindControl("gvSecond") as GridView;
DataTable dt= GetData1(Convert.ToInt32(customerId));
foreach (DataColumn col in dt.Columns)
{
//Declare the bound field and allocate memory for the bound field.
TemplateField bfield = new TemplateField();
//Initalize the DataField value.
bfield.HeaderTemplate = new GridViewTemplate(ListItemType.Header, col.ColumnName);
//Initialize the HeaderText field value.
bfield.ItemTemplate = new GridViewTemplate(ListItemType.Item, col.ColumnName);
//Add the newly created bound field to the GridView.
gvSecond.Columns.Add(bfield);
}
TotalColumns = dt.Columns.Count;
gvSecond.DataSource = dt;
gvSecond.DataBind();
}
}
}