Show image in Gridview row cell

Find Duplicate Rows from Sql Server table having primary key

Select duplicate rows to delete from SQL server

How to Keep Password on Post Back Event

Just Add The Following Code to code file: means aspx.cs file


If(!IspostBack)
{
      TextPassword.Attribute.Add("value","TextPassword.Text");
}

here TextPassword is TextBox ID which you use for Textbox Password

How to use Required Field validator on Dropdownlist

for Example:- the following code will help you

<asp:DropDownList ID="DropDownList1" runat="server" CssClass="Style1">
                        <asp:ListItem Value="0">select item</asp:ListItem>
                        <asp:ListItem Value="4">A</asp:ListItem>
                        <asp:ListItem Value="1">B</asp:ListItem>
                        <asp:ListItem Value="2">C</asp:ListItem>
                        <asp:ListItem Value="3">D</asp:ListItem>
                    </asp:DropDownList>

<asp:RequiredFieldValidator ID="RequiredFieldValidator_Drop" runat="server"
                        ErrorMessage="Select Any Items" ControlToValidate="DropDownList1"
                        CssClass="Style1" InitialValue="0"></asp:RequiredFieldValidator>

The main think is that you have to set Initial value Property with same as value of top of list Item of Dropdownlist

Nothing Impossible

hello World