private Dictionary<string, string> Readjson(string file)
{
exists = false;
string Jsonname = file;
if (!System.IO.File.Exists(Jsonname))
{
MessageBox.Show(Jsonname + " 檔案不存在");
OpenFileDialog path = new OpenFileDialog();
path.ShowDialog();
Jsonname = path.SafeFileName;
****判斷檔案不存在後選擇新的檔案，如何讓選擇的檔案在"return JsonConvert.DeserializeObject<Dictionary<string, string>>(File.ReadAllText(file));" 被執行
}
else
return JsonConvert.DeserializeObject<Dictionary<string, string>>(File.ReadAllText(file));
}

        private void button1_Click(object sender, EventArgs e)
        {

            CatalogMap = Readjson(@"json\CatalogMap.json");
            LanguageMap = Readjson(@"json\LanguageMap.json");
            ProviderMap = Readjson(@"json\ProviderMap.json");