Image to XML file for file transfer using ASP.NET and C#

• Download source code - 86.3 KB

Introduction

This article consists of operations which will transfer data to an XML file and read data from an XML file.

The method

First, create a simple ASPX page and name it as XML. Add a file, DataList, UploadButton inside the DataList tag. Add an img tag and set the image URL to:

Imgurl =<%#" content.aspx?id="+DataBinder.Eval(container.DataItem,"id") %>

Code

try
{
    DataSet ds=new DataSet();
    ds.ReadXml(Server.MapPath("XMLFile1.xml"));
    DataList1.DataSource=ds;
    DataList1.DataBind();
}
catch (Exception ex){Response.Write(ex.Message);} 

private void Button1_ServerClick(object sender, System.EventArgs e)
{
    Int64 len=file1.PostedFile.ContentLength;
    Byte[] byt=new byte[len];
    Stream st=file1.PostedFile.InputStream;
    int n = st.Read(byt,0,(int)len);
    DataSet ds=new DataSet();
    ds.ReadXml(Server.MapPath("XMLFile1.xml"));
    DataRow dr=ds.Tables[0].NewRow();
    dr["id"]=TextBox1.Text;
    dr["data"]=Implode(byt);
    ds.Tables[0].Rows.Add(dr);
    ds.WriteXml(Server.MapPath("XMLFile1.xml"));
    bind();
}

public string Implode(Byte[] array)
{
    //StringBuilder sb = new StringBuilder();
    String data=String.Empty;
    for (int i = 0; i < array.Length; ++i)
        data+=array[i].ToString()+"#";
    return data;
}

In the class file, read the XML file and store it in a DataSet, fill the data source of the DataList with the DataSet, and bind it.

Create another page: content.aspx

In the class file, get the request for the ID and check for the ID in the XML. If found, fill the data tag file to a string array and transfer it to bytes. Then, provide the response to the request by providing the content type and binary data.

string id=Request.QueryString["id"].ToString();
DataSet ds = new Dataset()

ds.ReadXml(Server.MapPath("XMLFile1.xml"));
{
    id=Request.QueryString["id"].ToString();
    foreach (DataRow dr in ds.Tables[0].Rows)
        if(dr["id"].ToString()==id)
            try
            {
                string[] str=dr["data"].ToString().Split('#');
                for (Int64 i = 0; i < str.Length-1; i++)
                    byt[i]=Convert.ToByte(str[i].ToString());
                break;
                Byte[] byt=new byte[str.Length];
                byt[i]=Convert.ToByte(str[i].ToString());
                Context.Response.ContentType="image/";
                Context.Response.BinaryWrite((byte[])byt);
            }
            catch(Exception ex){Console.Write(ex);}
}

Upload new data

To upload new data, browse the file and stream it. Later, store it to the XML file by converting the bytes[] and save the DataSet.

Finally

If you have a simpler solution than this, don't fail to email me about it.

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)