How to obtain a copy from a gridview?

Question

Hi Folks, Im trying to get a completly data copy from a gridview, itryed clone(), tryed cast DataView from DataSouce, but always get nulls or cant get the data, please exists a way to copy data from gridview, modified it and then reload it? or modifyng directly some rows in the gridview? thanks in advance!

Answer 1

What exactly is it you're trying to do with the data? Also is it a datagrid or a dataview and in what framework? If it's a datagrid that you're trying to copy the rows from,loop through the datagrid rows and add the row values to an arraylist.

Answer 2

Do you have viewstate=false on the grid?

What kind of datasource are you using? ListOf, SqlDataSource, ObjectDataSource, etc?

Perhaps make a copy of your datasource into a local variable before it is databound.

(ugly: Try saving it into viewstate or session).

Try a foreach on the gridview.rows after you've bound the data.

Answer 3

You can try using the OnRowDataBound attribute to do something like this

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.Header)
    {
        //HeaderStuff
    }
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        ObjectTye objectType = (ObjectType)e.Row.DataItem;
        // and doing some stuff with the properties
        e.Row.Cells[0].Text = objectType.SomeProperty.ToString();
        LinkButton deleteLnk = (LinkButton)e.Row.FindControl("lnkDelete");
        deleteLnk.Attributes.Add("onclick", "javascript:return " + 
            "confirm('Are you sure you want to delete this')");
        deleteLnk.CommandArgument = e.Row.RowIndex.ToString();
    }
}
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
    int rowIndex = int.Parse(e.CommandArgument.ToString());
    GridViewRow row = GridView1.Rows[rowIndex];

    ObjectType objectType = new ObjectType();
    objectType.StringProperty = row.Cells[0].Text;
}

Answer 4

Why not just bind the second grid the same source the first grid is bound to?

DataGridView1.DataSource = yourList;
DataGridView1.DataBind();
...
DataGridView2.DataSource = yourList; //or = DataGridView1.DataSource;
DataGridView2.DataBind();

As long as the data hasn't changed your should get an exact replica.