Correct Me where iam wrong?

Question

I am trying to display message records unavailable if the particular record is not found with grid header but the problem is I have set the reset button so that it becomes empty but still after clicking the button also it shows the message in the empty data template!!!

 

Please help me with a solution 

 

#Page design code

<div>
<table class="table">
<tr>
<td>
<asp:TextBox runat="server" ID="txtOrder_id" Width="180px">asp:TextBox>
td>
<td>
<asp:Button runat="server" ID="Btn" Text="Replacement request" OnClick="Btn_Click" Style="height: 26px" />
td>
<td>
<asp:Button runat="server" ID="btnstatus" Text="OrderRequest" OnClick="btnstatus_Click" />
td>
<td>
<asp:Button CssClass="btn" ID="btnreset" runat="server" Text="Reset" OnClick="btnreset_Click" />
td>
tr>
table>
div>
<div>
<table >
<tr>
<td>
<asp:GridView class="grd2" runat="server" ID="grdReplacementRequest" ShowHeaderWhenEmpty="true" AutoGenerateColumns ="False" OnRowEditing="grdReplacementRequest_RowEdit" OnRowUpdating="grdOrderReplacement_RowUpdating" CellPadding="4" ForeColor="#333333" GridLines="None">
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
<Columns>
<asp:TemplateField HeaderText="Customer_id">
<ItemTemplate>
<asp:Label ID="lblcustid" runat= "server" Text='<%#Bind("Customer_id") %>'>asp:Label>
ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtcustid" runat="server" >asp:TextBox>
FooterTemplate>
asp:TemplateField>
<asp:TemplateField HeaderText="Product_id">
<ItemTemplate>
<asp:Label ID="lblpdid" runat= "server" Text='<%#Bind("Product_id") %>'>asp:Label>
ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtproduct_id" runat="server" >asp:TextBox>
FooterTemplate>
asp:TemplateField>
<asp:TemplateField HeaderText="choice">
<ItemTemplate>
<asp:Label ID="lblchoice" runat= "server" Text='<%#Bind("choice") %>'>asp:Label>
ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="choice" runat="server" >asp:TextBox>
FooterTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtChoice" runat= "server" Text='<%#Bind("choice") %>'>asp:TextBox>
EditItemTemplate>
asp:TemplateField>
<asp:TemplateField HeaderText="Order_id">
<ItemTemplate>
<asp:Label ID="lblorderid" runat= "server" Text='<%#Bind("order_id") %>'>asp:Label>
ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtorderid" runat="server" >asp:TextBox>
FooterTemplate>
asp:TemplateField>
<asp:TemplateField HeaderText="TotalPurchaceValue">
<ItemTemplate>
<asp:Label ID="lblAmt" runat= "server" Text='<%#Bind("totalamount") %>'>asp:Label>
ItemTemplate>
<FooterTemplate>
<asp:TextBox ID="txtamt" runat="server" >asp:TextBox>
FooterTemplate>
asp:TemplateField>
<asp:TemplateField>
<EditItemTemplate>
<asp:Button ID="btnUpdates" runat="server" Text="Update" CommandName="Update" />
<%-- <asp:LinkButton ID="btnApprove" runat="server" Text="Approve" CommandName="Approved" />
<asp:LinkButton ID="btnReject" runat="server" Text="Reject" CommandName="Rejected" />--%>
EditItemTemplate>
<ItemTemplate>
<asp:Button ID="btnEdit" runat="server" Text="Edit" CommandName="Edit" />
ItemTemplate>
asp:TemplateField>
Columns>
<EmptyDataTemplate> No Records Available!! EmptyDataTemplate>
<EditRowStyle BackColor="#999999" />
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
asp:GridView>
td>
tr>
table>
div>
<div>
<table>
<tr>
<td><asp:GridView CssClass="grd3" runat="server" ID="grdOrderDetails" ShowHeaderWhenEmpty="true" AutoGenerateColumns="False" OnRowCancelingEdit="grdOrderDetails_RowCancelingEdit" OnRowEditing="grdOrderDetails_RowEditing" OnRowUpdating="grdOrderDetails_Rowupdating" ShowFooter="True" CellPadding="4" ForeColor="#333333" GridLines="None">
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
<Columns>
<asp:TemplateField HeaderText="Customer_id">
<ItemTemplate>
<asp:Label ID="Customer_id" runat="server" Text='<%#Bind("Customer_id") %>'>asp:Label>
ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtcustomerid" runat="server" Text='<%#Bind("Customer_id") %>'>asp:TextBox>
EditItemTemplate>
asp:TemplateField>
<asp:TemplateField HeaderText="Product_id">
<ItemTemplate>
<asp:Label ID="Product_id" runat="server" Text='<%#Bind("Product_id") %>'>asp:Label>
ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtproductid" runat="server" Text='<%#Bind("Product_id") %>'>asp:TextBox>
EditItemTemplate>
asp:TemplateField>
<asp:TemplateField HeaderText="Category_id">
<ItemTemplate>
<asp:Label ID="Category_id" runat="server" Text='<%#Bind("category_id") %>'>asp:Label>
ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtcategoryid" runat="server" Text='<%#Bind("category_id") %>'>asp:TextBox>
EditItemTemplate>
asp:TemplateField>
<asp:TemplateField HeaderText="Order_id">
<ItemTemplate>
<asp:Label ID="Order_id" runat="server" Text='<%#Bind("order_id") %>'>asp:Label>
ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtorderid" runat="server" Text='<%#Bind("order_id") %>'>asp:TextBox>
EditItemTemplate>
asp:TemplateField>
<asp:TemplateField HeaderText="TotalPurchaceValue">
<ItemTemplate>
<asp:Label ID="Amount" runat="server" Text='<%#Bind("total") %>'>asp:Label>
ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtamt" runat="server" Text='<%#Bind("total") %>'>asp:TextBox>
EditItemTemplate>
asp:TemplateField>
<asp:TemplateField HeaderText="Quantity">
<ItemTemplate>
<asp:Label ID="Quantity" runat="server" Text='<%#Bind("orderquantity") %>'>asp:Label>
ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="quantity" runat="server" Text='<%#Bind("orderquantity") %>'>asp:TextBox>
EditItemTemplate>
asp:TemplateField>
<asp:TemplateField HeaderText="Order_date">
<ItemTemplate>
<asp:Label ID="lblOrderdate" runat="server" Text='<%#Bind("Ordered_date") %>'>asp:Label>
ItemTemplate>
<EditItemTemplate>
<asp:TextBox ID="txtorderdate" runat="server" Text='<%#Bind("Ordered_date") %>'>asp:TextBox>
EditItemTemplate>
asp:TemplateField>
<asp:TemplateField>
<ItemTemplate>
<asp:Button ID="btn_Edit" runat="server" Text="Edit" CommandName="Edit" />
ItemTemplate>
<EditItemTemplate>
<asp:Button ID="btnUpdate" runat="server" Text="update" CommandName="Update" />
<asp:Button ID="btnCancel" runat="server" Text="cancel" CommandName="Cancel" />
EditItemTemplate>
<FooterTemplate>
<asp:Button ID="btnAdd" runat="server" Text="add" CommandName="Add" />
FooterTemplate>
asp:TemplateField>
Columns>
<EmptyDataTemplate>No Records AVailable!!EmptyDataTemplate>
<EditRowStyle BackColor="#999999" />
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<SortedAscendingCellStyle BackColor="#E9E7E2" />
<SortedAscendingHeaderStyle BackColor="#506C8C" />
<SortedDescendingCellStyle BackColor="#FFFDF8" />
<SortedDescendingHeaderStyle BackColor="#6F8DAE" />
asp:GridView>td>
tr>
table>
div>

#code behind to display message with grid header 

protected void Btn_Click(object sender, EventArgs e)
{
try
{
if ( grdReplacementRequest.Rows.Count > 0)
{
int Order_id = Convert.ToInt32(txtOrder_id.Text);
bal.getOrderReturnrequest(Order_id);
grdOrderShow();
}
else
{
DataTable dt = new DataTable();
grdReplacementRequest.DataSource = dt;
grdReplacementRequest.DataBind();
}
}
catch(Exception ex)
{
Console.WriteLine("error", ex.Message);
}
}

protected void btnstatus_Click(object sender, EventArgs e)
{
try
{
if (grdOrderDetails.Rows.Count > 0)
{
showGrid2();
}
else
{
DataTable dt = new DataTable();
grdOrderDetails.DataSource = dt;
grdOrderDetails.DataBind();
}
}
catch(Exception ex)
{
Console.WriteLine(ex.Message);
}
}
protected void btnreset_Click(object sender, EventArgs e)
{
txtOrder_id.Text = string.Empty;
grdOrderDetails.DataSource = null;
grdOrderDetails.DataBind();
grdReplacementRequest.DataSource = null;
grdReplacementRequest.DataBind();
}