In my previous tutorials, I’d explained about ExecuteReader, ExecuteScalar and Difference between ExecuteReader, ExecuteNonQuery, ExecuteScalar and other more cracking tutorials on Asp.net here.
Now here in this tutorial, I’ll explain Ado.net SQL Command, ExecuteNonQuery function in detail with example code.
The Ado.net Sql Command ExecuteNonQuery returns the number of row(s) affected while performing sql operations like INSERT, UPDATE, DELETE etc.
ExecuteNonQuery return -1 if there is no row affected, otherwise return int value indicating number of rows/columns affected while performing sql operation.
We can use ExecuteNonQuery only with SET, CREATE, INSERT, UPDATE, DELETE statements.
To explain further about executenonquery example, we need to create one database table to read data and bind retrieved result to asp.net gridview, so simply execute following script to sql query editor to create database table and then add few records manually or download from below complete example with script.
Here is the script to create “SubjectDetails” table:
(
[SubjectId] [int] IDENTITY(1,1) NOT NULL PRIMARY KEY,
[SubjectName] [nvarchar](100) NULL
)
HTML Markup – [.aspx]
Following is the complete HTML Markup for your .aspx page:
<head runat=”server”>
<title>AspnetO.com | ExecuteNonQuery Example</title>
</head>
<body>
<form id=”form1″ runat=”server”>
<div>
<table>
<tr>
<td colspan=”3″>
<h4>SqlCommand ExecuteNonQuery in ado.net example</h4>
</td>
</tr>
<tr>
<td colspan=”3″>
<asp:GridView ID=”gvSubjectDetails” runat=”server” AutoGenerateColumns=”false”
DataKeyNames=”SubjectID”>
<HeaderStyle Font-Bold=”true” BackColor=”#ff6600″ BorderColor=”#f5f5f5″
ForeColor=”White” Height=”30″ />
<Columns>
<asp:BoundField DataField=”SubjectID” HeaderText=”Subject Id”
ItemStyle-Width=”150px” />
<asp:BoundField DataField=”SubjectName” HeaderText=”Subject Name”
ItemStyle-Width=”200px” />
</Columns>
</asp:GridView>
</td>
</tr>
<tr>
<td colspan=”3″> </td>
</tr>
<tr>
<td colspan=”3″>
<asp:Button ID=”btnInsert” runat=”server” Text=”Insert Record” OnClick=”btnInsert_Click” />
</td>
</tr>
<tr>
<td colspan=”3″> </td>
</tr>
<tr>
<td>
<b>ExecuteNonQuery Returns:</b>
</td>
<td colspan=”2″>
<asp:Label ID=”lblReturnValue” runat=”server”></asp:Label>
</td>
</tr>
</table>
</div>
</form>
</body>
</html>
Now check the below sample code snippet that show you a simple executenonquery example:
ExecuteNonQuery Example – [C#]
string strConn = “Data Source=datasource;Integrated Security=true;Initial Catalog=yourDB”;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindGridviewFileData();
}
}
//button click event to get the scalar value
protected void btnInsert_Click(object sender, EventArgs e)
{
try
{
using (SqlConnection sqlConn = new SqlConnection(strConn))
{
using (SqlCommand sqlCmd = new SqlCommand())
{
sqlCmd.CommandText = “INSERT INTO SubjectDetails VALUES (‘jQuery’)”;
sqlCmd.Connection = sqlConn;
sqlConn.Open();
//here execute scalar will get firsr row first column value
int retValue = sqlCmd.ExecuteNonQuery();
if (retValue > 0)
{
lblReturnValue.Text = retValue + ” record(s) inserted!”;
//record(s) inserted so rebind fresh data
BindGridviewFileData();
}
else
{
lblReturnValue.Text = “No record(s) inserted!”;
}
sqlConn.Close();
}
}
}
catch { }
}
//bind subject details to gridview
private void BindGridviewFileData()
{
try
{
using (SqlConnection sqlConn = new SqlConnection(strConn))
{
using (SqlCommand sqlCmd = new SqlCommand())
{
sqlCmd.CommandText = “SELECT * FROM SubjectDetails”;
sqlCmd.Connection = sqlConn;
sqlConn.Open();
gvSubjectDetails.DataSource = sqlCmd.ExecuteReader();
gvSubjectDetails.DataBind();
sqlConn.Close();
}
}
}
catch { }
}
Ado.net SQL Command – ExecuteNonQuery Example – [Vb.net]
Dim strConn As String = “Data Source=datasource;Integrated Security=true;Initial Catalog=yourDB”
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
If Not IsPostBack Then
BindGridviewFileData()
End If
End Sub
‘button click event to get the scalar value
Protected Sub btnInsert_Click(ByVal sender As Object, ByVal e As EventArgs)
Try
Using sqlConn As New SqlConnection(strConn)
Using sqlCmd As New SqlCommand()
sqlCmd.CommandText = “INSERT INTO SubjectDetails VALUES (‘jQuery’)”
sqlCmd.Connection = sqlConn
sqlConn.Open()
‘here execute scalar will get firsr row first column value
Dim retValue As Integer = sqlCmd.ExecuteNonQuery()
If retValue > 0 Then
lblReturnValue.Text = retValue & ” record(s) inserted!”
‘record(s) inserted so rebind fresh data
BindGridviewFileData()
Else
lblReturnValue.Text = “No record(s) inserted!”
End If
sqlConn.Close()
End Using
End Using
Catch
End Try
End Sub
‘bind subject details to gridview
Private Sub BindGridviewFileData()
Try
Using sqlConn As New SqlConnection(strConn)
Using sqlCmd As New SqlCommand()
sqlCmd.CommandText = “SELECT * FROM SubjectDetails”
sqlCmd.Connection = sqlConn
sqlConn.Open()
gvSubjectDetails.DataSource = sqlCmd.ExecuteReader()
gvSubjectDetails.DataBind()
sqlConn.Close()
End Using
End Using
Catch
End Try
End Sub
Example Result
