Filter of Data in Gridview logical error please using asp.net
- by RajuBabli Abbasi
I wanted to filter the Data in asp.net but my Data is not filtering i have some logical error So please help me for this case i will be very thanks full to those who will help me please consider my code and replay me with code if you can so please i am waiting for your replay thanks again
my asp.cs file is
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{ DisplayStudentInformation(); }
}
private void DisplayStudentInformation()
{
string filter = "%" + filterTextBox.Text + "%";
if (filter == String.Empty)
filter = "%";
try
{
using (SqlDataReader reader = DAC.GetCompanyInformation(filter))
{//reader.Read();
StudentGridView.DataSource = reader;
StudentGridView.DataBind();
}
}
catch (SqlException ex)
{
StatusLabel.Text = ex.Message;
}
}
my .aspx file is
asp:Table ID="Tabel" runat ="server"
asp:TableRow
asp:TableCell
asp:Label ID="filterLabel" runat ="server" Text ="Company Name Filter:" AssociatedControlID="filterTextBox"
/asp:TableCell
asp:TableCell
asp:TextBox ID="filterTextBox" runat="server" MaxLength ="50"
/asp:TableCell
asp:TableCell
asp:Button ID="refreshButton" runat ="server" Text ="Filter" CausesValidation="false" /
/asp:TableCell
/asp:TableRow
/asp:Table
My DAC file is
public static SqlDataReader GetCompanyInformation(string filter)
{
SqlDataReader reader;
string sql = "SELECT * FROM Student WHERE LastName LIKE @prmLastName ";
using(SqlCommand command = new SqlCommand (sql,ConnectionManager.GetConnection()))
{//In ExecuteReader we pass the CommandBehavior as singleResult because we need the Single result and also passing the close connection when Datais retriev
// command.Parameters.Add("@prmLastName", SqlDbType.VarChar, 25).Value = filter;
command.Parameters.AddWithValue("@prmLastName", filter);
reader = command.ExecuteReader(CommandBehavior.SingleResult | CommandBehavior.CloseConnection);
}
return reader;
}
Note:- When i don't use the If(!Ispostback)
Condition and simply pass the DisplayStudentInformation(); method in my page load then Data can be filter but with If(!IspostBack ) condition which is also important for updating the data and for other purpose . Data can be filter . Se aim of the expert is that Filter the Data in a gridview using condition of IF(!IspostBack ) means without the removing is post back condition Filter the Data . I have been ask other about this question but no body solve this so please help me i will be very thanks full to you all ok
