重新绑定gridview与编辑模式有什么关系？

Question

Gridview remains in EDIT mode when i don't rebind it, why ? but when i rebind gridview that it exits out of eidt mode successfully, why ?

code:

protected void gvTest_EditCancel(Object sender, GridViewCancelEditEventArgs e) 
{
    gvTest.EditIndex = -1;
  //  connectToDb();
    Response.Write("<br/>"+ "Editing cancelled");
}`

public void connectToDb() 
{
    SqlConnection sqlcon = new SqlConnection(constrng);
    String com1 = "select * from login";
    SqlCommand sqlcom = new SqlCommand(com1, sqlcon);
    SqlDataAdapter sqlda = new SqlDataAdapter(sqlcom);
    DataSet ds = new DataSet();

    try
    {
        sqlcon.Open();
        sqlda.Fill(ds);
        gvTest.DataSource = ds;
        gvTest.DataBind();
    }
    catch (Exception exc)
    {
        Response.Write(exc.ToString());
    }
    finally
    {
        sqlcon.Close();
    }
}

but when call ConnectToDb() to rebind then it successfully exists out of edit mode, what a rebinding has to do with EDITING or exiting of it ?

Answer 1

It is the EditIndex that telling the gridview that it is in edit mode.

The zero-based index of the row to edit. The default is -1, which indicates that no row is being edited.

MSDN .

When you edit the gridview, EditIndex is set to the GridView RowIndex, which is always 0 or greater than 0. so the GridView stays in edit mode. To exit edit mode, you need to set the index to -1. When you cancel edit, it sets this index to -1.

In RowCancelingEdit we can set the editindex to -1. But it will not change the row to normal mode until we rebind the row. When we rebind the gridview, it resets the row(OnRowDataBound). (But it doesn't reset the EditIndex, I was wrong about this). That's why whenever we do any row editing or deleting, we need to rebind the gridview,

So,

1. To exit edit mode, we have to set EditIndex = -1
2. EditIndex change will not reflect until we rebind the GridView.