How Do I Dynamically Add An Image In Gridview Column

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C#

ASP.NET

Gridview

Hello everyone,

Am facing problem in gridview..

i have three columns in my grid.date,name and image.
I have to enter/select dynamically..so for date i have used calendar extender(Textbox) for name(Textbox) Image(ImageField).once if i enter date and name in textbox and am trying to upload an image using file upload the text is clearing..if i save and add new row images i have uploaded is clearing..and here iam saving images in one folder..if i run my application all images that i have selected before also am getting help me please how to solve my problem with kind heart...am a fresher don't mind if it is easy one..do help for me..am posting my code too..

Thanks in advance..


Source Code::

<asp:GridView ID="Gridview1" runat="server" ShowFooter="True"
            AutoGenerateColumns="False"
          >
        <Columns>
        <asp:TemplateField HeaderText="Date">
            <ItemTemplate>
                <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
                 <asp:CalendarExtender ID="CalendarExtender1" runat="server" TargetControlID="TextBox1" Format="dd/MM/yyyy">
                </asp:CalendarExtender>
            </ItemTemplate>
        </asp:TemplateField>

                        <asp:ImageField DataImageUrlField="Value" ControlStyle-Height="50" ControlStyle-Width="50"
                    HeaderText="Image">
                    <ControlStyle Height="50px" Width="50px"></ControlStyle>
                </asp:ImageField>



        <asp:TemplateField HeaderText="Name">
            <ItemTemplate>
                <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
            </ItemTemplate>
             <FooterStyle HorizontalAlign="Right" />
            <FooterTemplate>
             <asp:Button ID="ButtonAdd" runat="server" Text="Add New Row" OnClick="ButtonAdd_Click" />

            </FooterTemplate>
        </asp:TemplateField>
        </Columns>
        </asp:GridView>
        <asp:FileUpload ID="FileUpload1" runat="server" />
        <asp:Button ID="btnUpload" runat="server" Text="Display" OnClick="Upload" />

Code::



DataTable dt = new DataTable();

protected void Page_Load(object sender, EventArgs e)
{

if (!IsPostBack)
{
SetInitialRow();
filup();


}



}
private void SetInitialRow()
{
DataRow dr = null;
dt.Columns.Add(new DataColumn("Column1", typeof(string)));
dt.Columns.Add(new DataColumn("Column2", typeof(string)));
dt.Columns.Add("Value");
dr = dt.NewRow();
dr["Column1"] = string.Empty;
dr["Column2"] = string.Empty;
dt.Rows.Add(dr);
ViewState["CurrentTable"] = dt;

Gridview1.DataSource = dt;
Gridview1.DataBind();

}
private void AddNewRowToGrid()
{
int rowIndex =0;
if (ViewState["CurrentTable"] != null)
{
DataTable dtCurrentTable = (DataTable)ViewState["CurrentTable"];
DataRow drCurrentRow = null;
if (dtCurrentTable.Rows.Count > 0)
{
for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
{
TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[0].FindControl("TextBox1");
TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("TextBox2");
Image img = (Image)Gridview1.Rows[rowIndex].Cells[2].FindControl("Value");
drCurrentRow = dtCurrentTable.NewRow();

dtCurrentTable.Rows[i - 1]["Column1"] = box1.Text;
dtCurrentTable.Rows[i - 1]["Column2"] = box2.Text;
dtCurrentTable.Rows[i - 1]["Value"] = ViewState["path"];

rowIndex++;
}
dtCurrentTable.Rows.Add(drCurrentRow);
ViewState["CurrentTable"] = dtCurrentTable;

Gridview1.DataSource = dtCurrentTable;
Gridview1.DataBind();
}
}

SetPreviousData();
}
private void SetPreviousData()
{
int rowIndex = 0;
if (ViewState["CurrentTable"] != null)
{
DataTable dt = (DataTable)ViewState["CurrentTable"];
if (dt.Rows.Count > 0)
{
for (int i = 0; i < dt.Rows.Count; i++)
{
TextBox box1 = (TextBox)Gridview1.Rows[rowIndex].Cells[0].FindControl("TextBox1");
TextBox box2 = (TextBox)Gridview1.Rows[rowIndex].Cells[1].FindControl("TextBox2");
Image img = (Image)Gridview1.Rows[rowIndex].Cells[2].FindControl("Value");
box1.Text = dt.Rows[i]["Column1"].ToString();
box2.Text = dt.Rows[i]["Column2"].ToString();
rowIndex++;
}

}
}

}
protected void ButtonAdd_Click(object sender, EventArgs e)
{
AddNewRowToGrid();

}
protected void filup()
{
string[] filePaths = Directory.GetFiles(Server.MapPath("~/Img1/"));
List<listitem> files = new List<listitem>();
foreach (string filePath in filePaths)
{
string fileName = Path.GetFileName(filePath);
files.Add(new ListItem(fileName, "~/Img1/" + fileName));
}

if (files.Count == 1)
{
Gridview1.DataSource = files;
Gridview1.DataBind();
}
}

protected void Upload(object sender, EventArgs e)
{


if (FileUpload1.HasFile)
{
string fileName = Path.GetFileName(FileUpload1.PostedFile.FileName);
FileUpload1.PostedFile.SaveAs(Server.MapPath("~/Img1/") + fileName);
Response.Redirect(Request.Url.AbsoluteUri);

ViewState["path"] = fileName;


}
}