Assign value to FileUpload control on ASP.Net GridView Row selection

akhter

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User: akhter
Posted: on Apr 22, 2021 12:29 AM
Forum: Data Controls
Answer: 1
Views: 3064

I have two column of image in gridview, i am facing issue that if i select one row from gridview, then images is not getting load in FileUploader, when i update then record is not getting update,

so i want load image into FileUploader, when i select row from gridview

<asp:GridView ID="gvv" runat="server" AutoGenerateColumns="False" AutoGenerateSelectButton="True" BackColor="White" BorderColor="#E7E7FF" BorderStyle="None" BorderWidth="1px" CellPadding="3" CssClass="myGridClass" Font-Names="Arial" GridLines="Horizontal" Height="273px"  style="margin-left: 3px" Width="1032px" OnSelectedIndexChanged="gvv_SelectedIndexChanged" OnRowDataBound="gvv_RowDataBound">
    <AlternatingRowStyle BackColor="#F7F7F7" />
    <Columns>
          <asp:TemplateField HeaderText="Name">
            <ItemTemplate>
                <asp:Label ID="Level_Four_ID" runat="server" Text='<%#Bind("Level_Four_ID")%>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Name">
            <ItemTemplate>
                <asp:Label ID="Level_Four_Name" runat="server" Text='<%#Bind("Level_Four_Name")%>'></asp:Label>
            </ItemTemplate>
     </asp:TemplateField>
       <asp:TemplateField HeaderText="CNIC">
            <ItemTemplate>
                <asp:Label ID="C_CNIC" runat="server" Text='<%#Bind("C_CNIC")%>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Contact">
            <ItemTemplate>
                <asp:Label ID="Contact" runat="server" Text='<%#Bind("Contact")%>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
               <asp:TemplateField HeaderText="Contact">
            <ItemTemplate>
                <asp:Label ID="C_Cell2" runat="server" Text='<%#Bind("C_Cell2")%>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
                        <asp:TemplateField HeaderText="Address">
            <ItemTemplate>
                <asp:Label ID="C_EMail" runat="server" Text='<%#Bind("C_EMail")%>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Address">
            <ItemTemplate>
                <asp:Label ID="C_Address" runat="server" Text='<%#Bind("C_Address")%>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
            <asp:TemplateField HeaderText="Status">
            <ItemTemplate>
                <asp:Label ID="C_status" runat="server" Text='<%#Bind("C_status")%>'></asp:Label>
            </ItemTemplate>
        </asp:TemplateField>
                <asp:TemplateField HeaderText="Image">
        <ItemTemplate>
            <asp:Image ID="img1" runat="server" ImageUrl='<%# Eval("Data").ToString() %>' Height="100px" Width="100px" />
        </ItemTemplate>
    </asp:TemplateField>
             <asp:TemplateField HeaderText="Docx">
        <ItemTemplate>
            <asp:Image ID="img" runat="server" ImageUrl='<%# Eval("DataDoc").ToString() %>' Height="100px" Width="100px" />
        </ItemTemplate>
    </asp:TemplateField>
    </Columns>
    <FooterStyle BackColor="#B5C7DE" ForeColor="#4A3C8C" />
    <HeaderStyle BackColor="#4A3C8C" Font-Bold="True" ForeColor="#F7F7F7" />
    <PagerStyle BackColor="#E7E7FF" ForeColor="#4A3C8C" HorizontalAlign="Right" />
    <RowStyle BackColor="#E7E7FF" ForeColor="#4A3C8C" />
    <SelectedRowStyle BackColor="#738A9C" Font-Bold="True" ForeColor="#F7F7F7" />
    <SortedAscendingCellStyle BackColor="#F4F4FD" />
    <SortedAscendingHeaderStyle BackColor="#5A4C9D" />
    <SortedDescendingCellStyle BackColor="#D8D8F0" />
    <SortedDescendingHeaderStyle BackColor="#3E3277" />
</asp:GridView>

Attached Image :<br />
<asp:FileUpload ID="FileUpload1Pur"  onchange="showpreview(this);"   runat="server" CssClass="auto-style1" Width="246px" />
</label>
<label class="control-label mb-1" for="">Attached Image</label>
<br />
<asp:FileUpload ID="FileUpload2Doc" runat="server"  onchange="showpreview2(this);"  CssClass="auto-style1" Width="246px" />

protected void gvv_SelectedIndexChanged(object sender, EventArgs e)
{
    lblast.Text = (gvv.SelectedRow.FindControl("Level_Four_ID") as Label).Text;
    txtname.Text = (gvv.SelectedRow.FindControl("Level_Four_Name") as Label).Text;
    txtContact.Text = (gvv.SelectedRow.FindControl("Contact") as Label).Text;
    txtContact2.Text = (gvv.SelectedRow.FindControl("C_Cell2") as Label).Text;
    txtcnic.Text = (gvv.SelectedRow.FindControl("C_CNIC") as Label).Text;   
           
    txtaddress.Text = (gvv.SelectedRow.FindControl("C_Address") as Label).Text;
    txtemail.Text = (gvv.SelectedRow.FindControl("C_Email") as Label).Text;
    lbstatus.Text = (gvv.SelectedRow.FindControl("C_Status") as Label).Text;
    System.Web.UI.WebControls.Image img = (gvv.SelectedRow.FindControl("img") as System.Web.UI.WebControls.Image);
    System.Web.UI.WebControls.Image img1 = (gvv.SelectedRow.FindControl("img1") as System.Web.UI.WebControls.Image);
    Image1.ImageUrl = img.ImageUrl;
    Image2.ImageUrl = img1.ImageUrl;
}

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Adnaan

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ANSWER
User: Adnaan
Replied: on Apr 22, 2021 05:35 AM
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Hi akhter,

Assigning value to FileUpload control is not possible. Yoi need to make use of HiddenField to set the value.

Please refer below code.

HTML

<asp:HiddenField ID="hfId" runat="server" />
<asp:TextBox ID="txtName" runat="server"></asp:TextBox>
<asp:FileUpload ID="FileUpload1Pur" runat="server" />
<asp:FileUpload ID="FileUpload2Doc" runat="server" />
<asp:HiddenField ID="hfData1" runat="server" />
<asp:HiddenField ID="hfData2" runat="server" />
<asp:Button ID="btnUpdate" runat="server" Text="Update" />
<hr />
<asp:GridView ID="gvImages" runat="server" AutoGenerateColumns="false" AutoGenerateSelectButton="true"
    OnSelectedIndexChanged="OnSelectedIndexChanged" OnRowDataBound="OnRowDataBound">
    <Columns>
        <asp:BoundField DataField="Id" HeaderText="Image Id" />
        <asp:BoundField DataField="Name" HeaderText="Name" />
        <asp:TemplateField HeaderText="Image">
            <ItemTemplate>
                <asp:Image ID="img" runat="server" Height="100px" Width="100px" />
            </ItemTemplate>
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Docx">
            <ItemTemplate>
                <asp:Image ID="img1" runat="server" Height="100px" Width="100px" />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

Namespaces

using System.IO;
using System.Data;
using System.Configuration;
using System.Data.SqlClient;

Code

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
        using (SqlConnection conn = new SqlConnection(constr))
        {
            using (SqlDataAdapter sda = new SqlDataAdapter("SELECT * FROM tblFiles", conn))
            {
                DataTable dt = new DataTable();
                sda.Fill(dt);
                gvImages.DataSource = dt;
                gvImages.DataBind();
            }
        }
    }
}

protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        DataRowView dr = (DataRowView)e.Row.DataItem;
        string imageUrl = "data:image/jpg;base64," + Convert.ToBase64String((byte[])dr["Data"]);
        (e.Row.FindControl("img") as System.Web.UI.WebControls.Image).ImageUrl = imageUrl;

        string imageUrldoc = "data:image/jpg;base64," + Convert.ToBase64String((byte[])dr["DataDoc"]);
        (e.Row.FindControl("img1") as System.Web.UI.WebControls.Image).ImageUrl = imageUrldoc;
    }
}

protected void OnSelectedIndexChanged(object sender, EventArgs e)
{
    hfId.Value = gvImages.SelectedRow.Cells[1].Text;
    txtName.Text = gvImages.SelectedRow.Cells[2].Text;
    hfData1.Value = (gvImages.SelectedRow.FindControl("img") as Image).ImageUrl;
    hfData2.Value = (gvImages.SelectedRow.FindControl("img1") as Image).ImageUrl;
}

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Assign value to FileUpload control on ASP.Net GridView Row selection

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