为什么记录下不移动 [英] Why record not moving next

问题描述

当我点击下一个按钮时，它显示错误消息

Errot - 找不到表0

请帮忙。我的代码有什么问题。

When i click in Next Button it's showing Error Msg
Errot - Cannot find table 0
please help . what wrong in my code.

DataSet ds = new DataSet();
        int i = 0;
 
private void display()
        {
            SqlConnection conn = new SqlConnection(@"Data Source=MANISH-PC\SQLEXPRESS;Initial Catalog=Leavemanagement;Integrated Security=True;Pooling=False");
            conn.Open();
            SqlCommand command = new SqlCommand("select * from Emp_Details", conn);
            SqlDataReader dr = command.ExecuteReader();
            if (dr.HasRows)
            {
                dr.Read();
                txtempid.Text = dr["ID"].ToString();
                txtempname.Text = dr["Name"].ToString();
                cbempsex.Text = dr["Sex"].ToString();
                cbempcity.Text = dr["City"].ToString();
                txtempmobile.Text = dr["MobileNo"].ToString();
                txtempqulification.Text = dr["Qualification"].ToString();
                cbempdep.Text = dr["Department"].ToString();
                cbempdesg.Text = dr["Designation"].ToString();
                txtempadd.Text = dr["Address"].ToString();
                byte[] data = (byte[])dr["image"];
                MemoryStream ms = new MemoryStream(data);
                pictureBox1.Image = Image.FromStream(ms);
            }
  
private void cmdnext_Click(object sender, EventArgs e)
        {
            if (i < ds.Tables[0].Rows.Count - 1)
            {
                i++;
                display();
            }
            else
            {
                MessageBox.Show("No More");
            }
        }

推荐答案

你做什么？

with WHILE LOOP读取数据读取器中的所有记录并将其添加到数据集

what do you do?
with a WHILE LOOP read all records in data reader and add them to dataset

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