Error adding to a database in a website remake - sql

Question

I am trying to add a item to my database through a class made by me. I have this error
An exception of type 'System.FormatException' occurred in mscorlib.dll but was not handled in user code
Additional information: Input string was not in a correct format.
I am not sure where I went wrong but here is my code
protected void btnAdd_Click(object sender, EventArgs e)
{
string filename = FileUpload1.PostedFile.FileName;
int filebytes = FileUpload1.PostedFile.ContentLength;
byte[] image = new byte[filebytes];
FileUpload1.PostedFile.InputStream.Read(image, 0, filebytes);
string imagepath = "~/Image/" + filename;
pro.SaveNewProduct(int.Parse(txtID.Text), txtPName.Text, int.Parse(txtPrice.Text), txtDes.Text, imagepath, int.Parse(DDLCatagory.SelectedValue), int.Parse(DDLNPCAA.SelectedValue), DDLproductype.SelectedValue, int.Parse(txtQuant.Text));
}
public void SaveNewProduct(int id, string name, int price, string description, string image, int catagory, int popularity, string kindof, int quantity)
{
dal.ClearParams();
dal.AddParam("#ItemID", id);
dal.AddParam("#Name", name);
dal.AddParam("#Price", price);
dal.AddParam("#Descriptions", description);
dal.AddParam("#Images", image);
dal.AddParam("#Catagory", catagory);
dal.AddParam("#Popularity", popularity);
dal.AddParam("#Type", kindof);
dal.AddParam("#Quantity", quantity);
dal.ExecuteProcedure("spSNI");
}
Also I get the error at the pro.savenewproduct.
I have triple checked to see if I made any mistakes in what I typed as parameters and so far nothing seems off.
I am assuming you mean this, also I only typed 20 in the textbox for price to get this error:
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
<div style="float:right; margin-right:300px">
<asp:Image ID="Image1" runat="server" Width="200px" Height="200px" />
<br />
<asp:FileUpload ID="FileUpload1" runat="server" />
<br /><br />
<asp:Label ID="lblPName" runat="server" Text="Product Name"></asp:Label>
<asp:TextBox runat="server" ID="txtPName"></asp:TextBox>
<asp:Label ID="lblPrice" runat="server" Text="Price"></asp:Label>
<asp:TextBox runat="server" ID="txtPrice"></asp:TextBox>
<br /><br />
<asp:Label ID="lblDes" runat="server" Text="Description"></asp:Label>
<asp:TextBox runat="server" ID="txtDes"></asp:TextBox>
<asp:Label ID="lblquant" runat="server" Text="Quantity"></asp:Label>
<asp:TextBox runat="server" ID="txtQuant"></asp:TextBox>
<br /><br />
<asp:DropDownList runat="server" ID="DDLproductype">
<asp:ListItem>Select Product Type</asp:ListItem>
<asp:ListItem>Physical Product</asp:ListItem>
<asp:ListItem>Service Product</asp:ListItem>
</asp:DropDownList>
<asp:DropDownList runat="server" ID="DDLNPCAA"></asp:DropDownList>
<asp:DropDownList runat="server" ID="DDLCatagory"></asp:DropDownList>
<br />
<asp:Label ID="lblID" runat="server" Text="ID of Existing Item"></asp:Label>
<asp:TextBox ID="txtID" runat="server"></asp:TextBox>
<asp:DropDownList ID="DDListofitems" runat="server"></asp:DropDownList>
<br />
<asp:Button ID="btnupdateID" runat="server" Text="Update ID of Item" OnClientClick="btnupdateID_Click" OnClick="btnupdateID_Click" />
<br /><br />
<asp:Button ID="btnAdd" runat="server" Text="Add New Item Or Update" OnClick="btnAdd_Click" />