作业帮ds.Tables[0].Rows.Count > 1 private void button2_Click_1(object sender,EventArgs e){DataSet ds = new DataSet();string consqlserver = "Data Source=.;Initial Catalog=留言板;Integrated Security=SSPI";string sql = "SELECT * FROM liuyan";SqlConnection
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 12:05:46
ds.Tables[0].Rows.Count > 1 private void button2_Click_1(object sender,EventArgs e){DataSet ds = new DataSet();string consqlserver = "Data Source=.;Initial Catalog=留言板;Integrated Security=SSPI";string sql = "SELECT * FROM liuyan";SqlConnection
ds.Tables[0].Rows.Count > 1
private void button2_Click_1(object sender,EventArgs e)
{
DataSet ds = new DataSet();
string consqlserver = "Data Source=.;Initial Catalog=留言板;Integrated Security=SSPI";
string sql = "SELECT * FROM liuyan";
SqlConnection con = new SqlConnection(consqlserver);
SqlDataAdapter da = new SqlDataAdapter(sql,con);
try
{
da.Fill(ds);
if (ds.Tables[0].Rows.Count > 1)
{
dataGridView1.DataSource = ds.Tables[0];
}
}
catch
{
}
finally
{
con.Close();
con.Dispose();
da.Dispose();
}
}
ds.Tables[0].Rows.Count > 1 private void button2_Click_1(object sender,EventArgs e){DataSet ds = new DataSet();string consqlserver = "Data Source=.;Initial Catalog=留言板;Integrated Security=SSPI";string sql = "SELECT * FROM liuyan";SqlConnection
DataSet ds = new DataSet();// 创建一个内存集合,就像一个大大框一样,里面可以放很多很多的table
string consqlserver = "Data Source=.;Initial Catalog=留言板;Integrated Security=SSPI";//字符串连接
string sql = "SELECT * FROM liuyan";//连接字符串
SqlConnection con = new SqlConnection(consqlserver); 开始连接
SqlDataAdapter da = new SqlDataAdapter(sql,con);运用adapter作为一个桥梁,对数据的传输做铺垫.
try
{
da.Fill(ds);//通过上面的adapter把数据放进前面的dataset中
if (ds.Tables[0].Rows.Count > 1)//判断,如果我们刚放进去的表并且是第一个表里面有数据,则执行下面的语句.
{
dataGridView1.DataSource = ds.Tables[0];//绑定到页面的gridview控件
}
你要是按照上面的代码 应该前面的gridview控件没有显示内容.因为你少些了一个
dataGridView1.DataSource = ds.Tables[0];//绑定到页面的gridview控件
datagGridView1.DataBind();//加这一句才可以.