AspGridView_WithCustomeColumn_For_TextBox

button.aspx

<div>
  <asp:Button ID="btnApproveOrder" ClientIDMode="Predictable" Text="Approve Order" runat="server" CssClass="button" CommandName="ApproveOrder" CommandArgument="<%#((GridViewRow)Container).RowIndex %>" />
  <asp:Button ID="btnClear" ClientIDMode="Predictable" Text="Clear" runat="server" CssClass="button" />
</div>

grid_rowcommand.cs

 protected void aspGridView_RowCommand(object sender, GridViewCommandEventArgs e)
        {
            int rowIndex = 0;
            string ordernum = string.Empty;
            string approverid = string.Empty;
            UpdateData updateDataInDb = null;
            try
            {
                switch (e.CommandName)
                {
                    case "ApproveOrder":
                        rowIndex = Convert.ToInt32(e.CommandArgument);
                        GridViewRow row = aspGridView.Rows[rowIndex];
                        approverid = ((TextBox)row.FindControl("txtApproveId")).Text.ToString().Trim();
                        ordernum = row.Cells[0].Text.ToString().Trim();
                        updateDataInDb = new UpdateData();
                        updateDataInDb.UpdateApproverId(ordernum, approverid);
                        break;
                }

            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

grid_rowdatabound.cs

protected void aspGridView_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            Button approveOrderBtn = null;
            Button clearnBtn = null;
            DataRowView datarow = null;
            Label approvedBy = null;
            Label alertText = null;
            TextBox approvalid = null;
            HtmlGenericControl approvalSection = null;
            try
            {
                if (e.Row.RowType == DataControlRowType.DataRow)
                {
                    datarow = (DataRowView)e.Row.DataItem;
                    if (!string.IsNullOrEmpty(datarow[5].ToString()))
                    {
                        approvalSection = (HtmlGenericControl)e.Row.FindControl("ApprovalSection");
                        approvalSection.Visible = false;
                        approvedBy = (Label)e.Row.FindControl("txtapprovedBy");
                        approvedBy.Visible = true;
                    }
                    else
                    {
                        approveOrderBtn = (Button)e.Row.FindControl("btnApproveOrder");
                        clearnBtn = (Button)e.Row.FindControl("btnClear");
                        alertText = (Label)e.Row.FindControl("alertMsg");
                        approvalid = (TextBox)e.Row.FindControl("txtApproveId");
                        if (approveOrderBtn != null)
                            approveOrderBtn.OnClientClick = "return ValidateInput('" + approvalid.ClientID + "','" + alertText.ClientID + "')";
                        if (clearnBtn!=null)
                            clearnBtn.OnClientClick= "return ClearInputField('"+approvalid.ClientID+"')";
                    }
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

gridview_asp.aspx

 <asp:GridView ID="aspGridView" runat="server" AutoGenerateColumns="false" Width="100%" style="margin-top:20px;" OnRowCommand="aspGridView_RowCommand" OnRowDataBound="aspGridView_RowDataBound">
                <Columns>
                    <asp:BoundField HeaderText="Order Number" DataField="ORD_NUM" ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" />
                    <asp:BoundField HeaderText="Order Amount" DataField="ORD_AMOUNT" ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" />
                    <asp:BoundField HeaderText="Order Date" DataField="ORD_DATE" ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" />
                    <asp:BoundField HeaderText="Customer Date" DataField="CUST_NAME" ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" />
                    <asp:BoundField HeaderText="Order Description" DataField="ORD_DESCRIPTION" ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" />
                    <asp:TemplateField HeaderText="Approve Order">
                        <ItemTemplate>
                            <section id="ApprovalSection" runat="server" style="margin-top: 5px;">
                                <div class="approveUserIdSection">
                                    <asp:TextBox ID="txtApproveId" ClientIDMode="Predictable" 
                                        placeholder="Approver ID" 
                                        runat="server" 
                                        MaxLength="11"></asp:TextBox>
                                    <asp:Label ID="alertMsg" 
                                        ClientIDMode="Predictable" 
                                        runat="server" 
                                        CssClass="validatorMsgGrid"></asp:Label>                                  
                                </div>
                                <div>
                                    <asp:Button ID="btnApproveOrder" ClientIDMode="Predictable" Text="Approve Order" runat="server" CssClass="button" CommandName="ApproveOrder" CommandArgument="<%#((GridViewRow)Container).RowIndex %>" />
                                    <asp:Button ID="btnClear" ClientIDMode="Predictable" Text="Clear" runat="server" CssClass="button" />
                                </div>
                            </section>
                            <asp:Label ID="txtapprovedBy" runat="server" Visible="false" Text='<%# "Approved By " + Eval("APPROVAL_ID") %>' CssClass="approvedByMsg"></asp:Label>
                        </ItemTemplate>
                    </asp:TemplateField>
                </Columns>
            </asp:GridView>