Question

数据源的类型无效。它必须是 IListSource、IEnumerable 或 IDataSource。

protected void Button3_Click(object sender, EventArgs e)
{

DataSet ds = new DataSet();

SQLHelper hh = new SQLHelper();

if (DropDownList1.SelectedValue == "查询全部")
{
SqlParameter[] prams = { };

ds = hh.ExecuteDataSet("tblNews_GetAll", prams);
}
if (DropDownList1.SelectedValue == "按编号查询")
{
int NewsId = Convert.ToInt32(TextBox1.Text);
SqlParameter[] prams = {
new SqlParameter("@NewsId",SqlDbType.Int)
};
prams[0].Value = NewsId;
ds = hh.ExecuteDataSet("tblNews_GetId", prams);
}

if (DropDownList1.SelectedValue == "按时间查询")
{
DateTime NewsTime = Convert.ToDateTime(TextBox1.Text);
SqlParameter[] prams = {
new SqlParameter("@NewsTime",SqlDbType.DateTime)
};
prams[0].Value = NewsTime;

ds = hh.ExecuteDataSet("tblNews_GetTime", prams);
}
if (DropDownList1.SelectedValue == "按标题查询")
{
string NewsTitle = TextBox1.Text;
SqlParameter[] prams = {
new SqlParameter("@NewsTitle",SqlDbType.NVarChar)
};
prams[0].Value = NewsTitle;

ds = hh.ExecuteDataSet("tblNews_GetTitle", prams);
}
if (DropDownList1.SelectedValue == "按作者查询")
{
string NewsAuthor = TextBox1.Text;
SqlParameter[] prams = {
new SqlParameter("@NewsAuthor",SqlDbType.NVarChar)
};
prams[0].Value = NewsAuthor;

ds = hh.ExecuteDataSet("tblNews_GetAuthor", prams);
}
GridView1.DataSource = hh;
GridView1.DataBind();

Answer 1

是给 repeater 绑定数据的时候报的错误吧？
意思是 只有实现了 IListSource 或 IEnumerable 接口的对象才能做为他的数据源
比如 恭阀多合鼙骨俄摊藩揩DataTable DataSet Xml Arrry
像 String int 这样的类型是不能直接作为它的数据源的