如何让我的 gridview 中选择的行显示在我的文本框中？

Question

我有一个Gridview，它只显示数据库表中的某些列。我的GridView 中也有一个选择按钮和删除按钮。

这是GridView的代码

<asp:GridView ID="GridViewClient" runat="server" DataKeyNames="FirstName"
     OnSelectedIndexChanged="GridViewClient_SelectedIndexChanged"
     OnRowDeleting="GridViewClient_RowDeleting">
  <Columns>
     <asp:CommandField HeaderText="Update" ShowSelectButton="True" />
     <asp:CommandField HeaderText="Delete" ShowDeleteButton="True" />
  </Columns>
</asp:GridView>

然后，当用户选择select 按钮时，它应该在文本框中显示整个表格。

这是select按钮的代码：

protected void GridViewClient_SelectedIndexChanged(object sender, EventArgs e)
{
    EditClient.Visible = true;
    GridViewRow row = GridViewClient.SelectedRow;
    string constr = @"string";
    using (SqlConnection con = new SqlConnection(constr))
    {
        using (SqlCommand cmd = new SqlCommand("SELECT * FROM tbl_newclient"))
        {
            cmd.CommandType = CommandType.Text;
            cmd.Connection = con;
            con.Open();
            using (SqlDataReader sdr = cmd.ExecuteReader())
            {
                sdr.Read();
                txtFirstName.Text = sdr["FirstName"].ToString();
                txtLastName.Text = sdr["LastName"].ToString();
                txtContactNumber.Text = sdr["ContactNumber"].ToString();
                txtEmailAddress.Text = sdr["EmailAddress"].ToString();
                txtAddress.Text = sdr["Address"].ToString();
                txtRestrictions.Text = sdr["Restrictions"].ToString();
                txtThirdPartySupport.Text = sdr["ThirdPartySupport"].ToString();
                txtBasicNotes.Text = sdr["BasicNotes"].ToString();
            }
            con.Close();
        }
    }
    Update.Visible = true;
}

texboxes 在页面加载时隐藏，仅在select 上可见 现在发生的情况是，当我单击任意行上的 select 按钮时，GridView 的第一行会显示在文本框中？

我不确定我在这里做错了什么？

谢谢

Answer 1

我不完全理解您的要求，因为我看不到您的所有代码，但我认为问题可能是您仅使用数据阅读器读取第一行。你可以试试这样的

using (SqlDataReader sdr = cmd.ExecuteReader())
{
   if (sdr.HasRows)
   {
      while (sdr.Read())
      {
         //I'm not sure what you want to do here? i've just addede to the existing text in the textbox
         txtFirstName.Text += sdr["FirstName"].ToString();
         txtLastName.Text += sdr["LastName"].ToString();
         txtContactNumber.Text += sdr["ContactNumber"].ToString();
         txtEmailAddress.Text += sdr["EmailAddress"].ToString();
         txtAddress.Text += sdr["Address"].ToString();
         txtRestrictions.Text += sdr["Restrictions"].ToString();
         txtThirdPartySupport.Text += sdr["ThirdPartySupport"].ToString();
         txtBasicNotes.Text += sdr["BasicNotes"].ToString();
      }
   }
}

Answer 2

我猜你的Gridview 中有tbl_newclient 表的primarykey。然后选择从gridview 获取主键并在sql query 上附加一个where 条件，然后它应该返回所需的数据。

    protected void GridViewClient_SelectedIndexChanged(object sender, EventArgs e)
    {
     EditClient.Visible = true;
     var primarykey = GridViewClient.SelectedRow.Cells[0].Text; // 0 cell index primary key
     string constr = @"string";
     using (SqlConnection con = new SqlConnection(constr))
     {
        using (SqlCommand cmd = new SqlCommand("SELECT * FROM tbl_newclient where yourprimarykey=@primarykey"))
        {
            cmd.Parameters.AddWithValue("@primarykey", primarykey);
            cmd.CommandType = CommandType.Text;
            cmd.Connection = con;
            con.Open();
           using (SqlDataReader sdr = cmd.ExecuteReader())
           {
             if (sdr.HasRows)
              {
                 while (sdr.Read())
                   {
                    txtFirstName.Text = sdr["FirstName"].ToString();
                    txtLastName.Text = sdr["LastName"].ToString();
                    txtContactNumber.Text = sdr["ContactNumber"].ToString();
                    txtEmailAddress.Text = sdr["EmailAddress"].ToString();
                    txtAddress.Text = sdr["Address"].ToString();
                    txtRestrictions.Text = sdr["Restrictions"].ToString();
                    txtThirdPartySupport.Text = sdr["ThirdPartySupport"].ToString();
                    txtBasicNotes.Text = sdr["BasicNotes"].ToString();
                   }
              }
         }
         con.Close();
        }
    }
    Update.Visible = true;
    }