This tutorial will show you how to get connectionstring from configuration file using ASP.NET 2.0 and C#.
At first, please import the namespace from System.Configuration.
The System.Configuration namespace contains classes that represents a configuration file applicable to a particular computer, application, or resource.
| using System.Configuration; |
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In order to show the result of the sample, we will use the btn_GetConn_Click and GetConnectionString to perform the task. The sample code as following:
public string GetConnectionString(string _connectionStringsName)
{
System.Configuration.ConnectionStringSettingsCollection config = System.Configuration.ConfigurationManager.ConnectionStrings;
for (int i = 0; i < config.Count; i++) {
if (config[i].Name.Equals(_connectionStringsName, StringComparison.OrdinalIgnoreCase))
return config[i].ToString(); }
}
protected void btn_GetConn_Click(object sender, EventArgs e)
{
this.lblMessage.Text = GetConnectionString(this.tb_connName.Text.Trim()); } |
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The front end page looks something like this:
<div align="center">
<asp:Button ID="Button1" runat="server" Text="Zip" Width="71px" OnClick="Button1_Click" /> <asp:Button ID="Button2" runat="server" Text="UnZip" Width="76px" OnClick="Button2_Click" /> |
The front end SeekConnectionStringCsharp.aspx page looks something like this:
<div align="center">
<asp:Label ID="Label1" runat="server" Text="Connection Name:"></asp:Label>
<asp:TextBox ID="tb_connName" runat="server"></asp:TextBox>
<asp:Button ID="btn_GetConn" runat="server" Text="Get ConnectionString" OnClick="btn_GetConn_Click" /></div>
<div align="center">
<asp:Label ID="lblMessage" runat="server" ForeColor="Red">ConnectionString1,ConnectionString2</asp:Label>
</div> |
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The flow for the code behind page is as follows
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e) {
// This tutorial is provided in part by Server Intellect Web Hosting Solutions http://www.serverintellect.com
// Visit http://www.AspNetTutorials.com for more ASP.NET Tutorials } public string GetConnectionString(string _connectionStringsName) {
System.Configuration.ConnectionStringSettingsCollection config = System.Configuration.ConfigurationManager.ConnectionStrings; for (int i = 0; i < config.Count; i++) {
if (config[i].Name.Equals(_connectionStringsName, StringComparison.OrdinalIgnoreCase))
return config[i].ToString(); } return String.Empty; } protected void btn_GetConn_Click(object sender, EventArgs e) {
this.lblMessage.Text = GetConnectionString(this.tb_connName.Text.Trim()); } |
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