我想将数据库中的数据显示到网格视图控件中

Question

我想将存储在数据库table中的数据检索到gridview控件中，我的ado代码是

   public void retrieve_client()
    {
        SqlConnection con = new SqlConnection(DBconnection.connectstr);
        con.Open();
        SqlCommand com = new SqlCommand("retrieve_client", con);
        com.CommandType = CommandType.StoredProcedure;
        com.Parameters.Add("@name", SqlDbType.VarChar).Value = this.name;
        SqlDataReader r = com.ExecuteReader();
        if(r.HasRows)
        {
            if(r.Read())
            {
                this.name =    r[0].ToString();
                this.address = r[1].ToString();
                this.phone =   r[1].ToString();
            }
        }
        r.Close();
        con.Close();
    }

我的 Web 表单源是我想在文本框中输入名称并检索数据并将它们显示到网格视图控件中，请回答我：

我的网络表单来源是：

    <table>
<tr>
    <td>

        <label class="labelclient">Name</label>
            </td>

    <td class="clientpadding">

        <asp:TextBox ID="Textbox_retrieveclientbyname_first" runat="server" placeholder=" First Name" cssclass="textboxstyle" required="required"></asp:TextBox>

        &nbsp; &nbsp; 


            <asp:TextBox ID="Textbox_retrieveclientbyname_second" runat="server" placeholder=" Second Name" CssClass="textboxstyle" required="required"></asp:TextBox>

         &nbsp; &nbsp; 

    <asp:TextBox ID="Textbox_retrieveclientbyname_third" runat="server" placeholder=" Third Name" CssClass="textboxstyle" required="required"></asp:TextBox>

      </td>

</tr>
</table>
<br />
<br />
<table>
    <tr>
        <td class="buttontd">
            <asp:Button ID="btn_find_clientbyname" runat="server" Text="Find" CssClass="addclientbutton" OnClick="btn_find_clientbyname_Click"/>
        </td>
        <td>
            <asp:Label ID="lbl_ermsg" runat="server" ></asp:Label>
        </td>
    </tr>
</table>
<div>
    <asp:GridView ID="GridView_clientbyname" runat="server" >
        <HeaderStyle CssClass="gridheader"/>
        <RowStyle CssClass="gridrow" />
        <AlternatingRowStyle cssclass="gridaltrow" />
    </asp:GridView>
</div>

`

Answer 1

Use DataAdapter to Fill DataTable And bind the GridView With That DataTable

 public void retrieve_client()
    {
        SqlConnection con = new SqlConnection(DBconnection.connectstr);
        con.Open();
        SqlCommand com = new SqlCommand("retrieve_client", con);
        com.CommandType = CommandType.StoredProcedure;
        com.Parameters.Add("@name", SqlDbType.VarChar).Value = this.name;
        SqlDataAdapter da = New SqlDataAdapter(com);
        DataTable dt=New DatTable();
        da.Fill(dt);
        con.Close();
        GridView_clientbyname.DataSource=dt;
        GridView_clientbyname.DataBind();

    }

我想将数据库中的数据显示到网格视图控件中

i want to display data that is in database into grid view control

c#

asp.net

ado.net

gridview