Save Uploaded FilePath in variable in ASP.Net using C#

Hi gaikashu16,

Why you want to retain the variable?

Please make use of Session to store the value.

Hi gaikashu16,

Please refer the below sample.

HTML

<asp:Image ID="Image1" runat="server" Width="100" Height="100" CssClass="custom-image" /><br />
<asp:FileUpload ID="fileUpload" runat="server" />
<asp:Button ID="btnAttachImage" runat="server" Text="Attach Image" OnClick="btnAttachImage_Click" />
<asp:TextBox ID="txtCmpId" runat="server" Width="100"></asp:TextBox>

Code

public string ImageId
{
    get { return Session["ImageId"] != null ? Session["ImageId"].ToString() : ""; }
    set
    {
        Session["ImageId"] = value;
    }
}

public string FileExtension
{
    get { return Session["FileExtension"] != null ? Session["FileExtension"].ToString() : ""; }
    set
    {
        Session["FileExtension"] = value;
    }
}

public string FilePath
{
    get { return Session["FilePath"] != null ? Session["FilePath"].ToString() : ""; }
    set
    {
        Session["FilePath"] = value;
    }
}

protected void btnAttachImage_Click(object sender, EventArgs e)
{
    if (fileUpload.HasFile)
    {
        // Generate a unique ID for the image
        this.ImageId = GenerateImageId();

        // Get the file extension
        this.FileExtension = Path.GetExtension(fileUpload.FileName);

        // Save the file with the ID and extension
        this.FilePath = Server.MapPath("~/Images/" + this.ImageId + this.FileExtension);
        fileUpload.SaveAs(this.FilePath);

        // Set the image URL to display the uploaded image
        Image1.ImageUrl = "~/Images/" + this.ImageId + this.FileExtension;
        //lblFileName.Text = fileUpload.FileName;
    }
    else
    {
        // Handle case when no file is selected
        this.ImageId = string.Empty;
        this.FileExtension = string.Empty;
        this.FilePath = string.Empty;
    }
}
private string GenerateImageId()
{
    string code = txtCmpId.Text;
    return code;
}

i want to store path in the database thats why i was trying to do that if is there any other solution to do that. And i tried some suggested answers to store state also on Attach image

// Store the file path in ViewState
ViewState["FilePath"] = "~/Images/" + imageId + fileExtension;

and on page load but when the image gets upload the if (!IsPostBack) returns true and if part does not get execute so for trial i wrote that block of code in else part of thi( if (!IsPostBack)) but then

if (ViewState["FilePath"] != null) this line shows null so i did not get filepath anyways

if (!IsPostBack)    
{
    // Check if the file path exists in ViewState and update the Image control
    if (ViewState["FilePath"] != null)
    {
        string filePath = ViewState["FilePath"].ToString();
        Image1.ImageUrl = filePath;
    }
}

Use the Session state. As given in the sample code.