No overload for 'Button1_Click' matches delegate 'System.EventHandler'?

Question

I want to display values from db to grid view with image file. While using given below code it shows an error. Help me to find a proper solution.

Code:

 protected void Button1_Click(object sender, GridViewRowEventArgs e1)
    {
        ShadingAnalysisDataSetTableAdapters.tbl_SiteLayOutUploadTableAdapter sl;
        sl = new ShadingAnalysisDataSetTableAdapters.tbl_SiteLayOutUploadTableAdapter();
        DataTable dt = new DataTable();
        dt = sl.GetGridData(ddlSit.SelectedValue, int.Parse(ddlVersion.SelectedValue));
        try
        {
          if (e1.Row.RowType == DataControlRowType.DataRow && gvEdit.EditIndex == e1.Row.RowIndex)
            {
              Image Image1 = (Image)e1.Row.FindControl("Image1");
              foreach (DataRow row in dt.Rows)
               {
                  byte[] img1 = (byte[])row["ImgData"];
                  string base1 = Convert.ToBase64String(img1);
                  Image1.ImageUrl = "data:image/jpg;base64," + base1;
               }
          }
            gvEdit.DataSource = dt;
            gvEdit.DataBind();
        }
        catch (NullReferenceException ex)
        {

        }
    }

ASPX:

 <asp:Button ID="Button1" runat="server" Text="Submit" OnClick="Button1_Click" />

Answer 1

You need to change function prototype like below:

 protected void Button1_Click(object sender, EventArgs e1)
 {
 }

Answer 2

Parameters of your Button1_Click is wrong. It should look like below.

protected void Button1_Click(object sender, EventArgs e)
{

}