C# - Get Data From Mysql Database?
Apr 13, 2010How get data from mysql database? I use ASP.NET and C#.Previously, I used LINQ but it does not work with mysql database
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Dec 21, 2010My code is to update a record if it already exists in database else insert as a new record. My code is as follows:
protected void Button3_Click(object sender, EventArgs e)
{
OdbcConnection MyConnection = new OdbcConnection("Driver={MySQL ODBC 3.51 Driver};Server=localhost;Database=testcase;User=root;Password=root;Option=3;");
MyConnection.Open();
String MyString = "select fil_no,orderdate from temp_save where fil_no=? and orderdate=?";
OdbcCommand MyCmd = new OdbcCommand(MyString, MyConnection);
MyCmd.Parameters.AddWithValue("", HiddenField4.Value);
MyCmd.Parameters.AddWithValue("", TextBox3.Text);
using (OdbcDataReader MyReader4 = MyCmd.ExecuteReader())
{
//**
if (MyReader4.Read())
{
String MyString1 = "UPDATE temp_save SET order=? where fil_no=? AND orderdate=?";
OdbcCommand MyCmd1 = new OdbcCommand(MyString1, MyConnection);
MyCmd1.Parameters.AddWithValue("", Editor1.Content.ToString());
MyCmd1.Parameters.AddWithValue("", HiddenField1.Value);
MyCmd1.Parameters.AddWithValue("", TextBox3.Text);
MyCmd1.ExecuteNonQuery();
}
else
{
// set the SQL string
String strSQL = "INSERT INTO temp_save (fil_no,order,orderdate) " +
"VALUES (?,?,?)";
// Create the Command and set its properties
OdbcCommand objCmd = new OdbcCommand(strSQL, MyConnection);
objCmd.Parameters.AddWithValue("", HiddenField4.Value);
objCmd.Parameters.AddWithValue("", Editor1.Content.ToString());
objCmd.Parameters.AddWithValue("", TextBox3.Text);
// execute the command
objCmd.ExecuteNonQuery();
}
}
}
I am getting the error as: ERROR [42000] [MySQL][ODBC 3.51 Driver][mysqld-5.1.51-community]You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'order,orderdate) VALUES ('04050040272009',' &' at line 1
The datatype for fields in table temp_save are:
fil_no-->INT(15)( to store a 15 digit number)
order-->LONGTEXT(to store contents from HTMLEditor(ajax control))
orderdate-->DATE(to store date)
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[Code]....
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How do I do that?
I have thought of following option:
1) Every 11 seconds, an Excel macro will run and will "Save as" excel as CSV file. (not sure whether this can be done by macro...just thinking)
2) This CSV file we will FTP to remote server using Windows Service.
3) On remote server, we will parse the csv file and Update MYSQL database.
Is this approach fine? Or do you have a better approach which requires less time to update the database?
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[Code]....
My asp code is as follows:
[Code]....
At the moment I'm getting an error about the "trash" data, it's an Int32 field, but I'm not sure how to handle that.
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May 5, 2010I have been stuck on this for a while and I can't seem to get it to work despite looking for answers in books and all over the web, so I hope perhaps you all can help me figure this out...
Here's what I'm trying to do....
I have some information in a simple product database displaying in a gridview table. One of the columns is a row of checkboxes indicating whether the item has been discontinued or not. When the row gets updated, it needs to update the checkbox value in the database.
1. It needs to be disabled until the row is getting edited.
2. Send the string value of 0 or 1 to the database when the row is updated.
Here's the code for the sql datasource and the gridview part in question...
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:sqlDataMaster %>"
ProviderName="<%$ ConnectionStrings:sqlDataMaster.ProviderName %>"
SelectCommand="SELECT ID, ProductName, ListPrice, Discontinued FROM Products"
UpdateCommand="UPDATE Products SET ProductName=@ProductName, ListPrice=@ListPrice, Discontinued=@Discontinued WHERE ID=@ID"
DeleteCommand="DELETE FROM Products WHERE ID=@ID">
<UpdateParameters>
<asp:Parameter Name="ID" Type="Int32" />
<asp:Parameter Name="ProductName" Type="String" />
<asp:Parameter Name="ListPrice" Type="Double" />
<asp:Parameter Name="Discontinued" Type="Boolean" />
</UpdateParameters>
<DeleteParameters>
<asp:Parameter Name="ID" Type="Int32" />
<asp:Parameter Name="ProductName" Type="String" />
<asp:Parameter Name="ListPrice" Type="Double" />
<asp:Parameter Name="Discontinued" Type="Boolean" />
</DeleteParameters>
</asp:SqlDataSource>
<asp:GridView ID="GridView1" runat="server" AllowPaging="True"
AutoGenerateColumns="False" AllowSorting="True"
DataSourceID="SqlDataSource1" CellPadding="3"
GridLines="Vertical" BackColor="White" BorderColor="#999999"
BorderStyle="None" BorderWidth="1px"
DataKeyNames = "ID">
<Columns>
<asp:CommandField ShowSelectButton="True" ShowEditButton="true" ShowDeleteButton="true" />
<asp:BoundField DataField="ID" HeaderText="Product ID" SortExpression="ID" ReadOnly="true" />
<asp:BoundField DataField="ProductName" HeaderText="Product Name"
SortExpression="ProductName" >
<ItemStyle HorizontalAlign="Left" />
</asp:BoundField>
<asp:BoundField DataField="ListPrice" DataFormatString="{0:c}"
HeaderText="Unit Price" SortExpression="ListPrice" />
<asp:TemplateField HeaderText="Discontinued" ItemStyle-HorizontalAlign="Center">
<ItemTemplate>
<asp:CheckBox id="Discontinued" runat="server"
Checked='<%#Convert.ToBoolean(Eval("Discontinued")) %>' />
</ItemTemplate>
<ItemStyle HorizontalAlign="Center"></ItemStyle>
</asp:TemplateField>
</Columns>
<FooterStyle BackColor="#CCCCCC" ForeColor="Black" />
<PagerStyle BackColor="#999999" ForeColor="Black" HorizontalAlign="Center" />
<SelectedRowStyle BackColor="#008A8C" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#000084" Font-Bold="True" ForeColor="White" />
<AlternatingRowStyle BackColor="#DCDCDC" />
</asp:GridView>
Here's a live version for you to look at...
http://homeworksite.mythandmagicstudios.com/homework4/proj3/default.aspx
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Mar 26, 2010protected void Button3_Click(object sender, EventArgs e)
{
//Create a connection to the database
MySqlConnection conn = new MySqlConnection("Database=kid07025;Data Source=195.178.228.254;User Id=kid07025;Password=********");
//open the connection
conn.Open();
//MySQL Query which updates the row where Anvandarnamn = Anvandarnamn (recieved from a cookie)
MySqlCommand cmd = new MySqlCommand("UPDATE personer SET Information=?Information,Fnamn=?Fnamn,Enamn=?Enamn,Personnr=?Personnr,Adress=?Adress,Postnr=?Postnr,Ort=?Ort WHERE Anvandarnamn=?Anvandarnamn", conn);
// Update with new text
cmd.Parameters.AddWithValue("?Anvandarnamn", Request.Cookies["Anvandarnamn"].Value);
cmd.Parameters.AddWithValue("?Information", TextBox1.Text);
cmd.Parameters.AddWithValue("?Fnamn", TextBox2.Text);
cmd.Parameters.AddWithValue("?Enamn", TextBox3.Text);
cmd.Parameters.AddWithValue("?Personnr",TextBox4.Text);
cmd.Parameters.AddWithValue("?Adress", TextBox5.Text);
cmd.Parameters.AddWithValue("?Postnr", TextBox6.Text);
cmd.Parameters.AddWithValue("?Ort", TextBox7.Text);
cmd.ExecuteReader();
conn.Close();
RefreshProfile();
}
I don't know what I am doing wrong here, but the database doesn't get updated when I press the button.
I use VS 2010, ASP.NET
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[URL]
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When I build the website and upload everything as it is, I get this error:
Quote:
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) I guess I have to deploy Database, or?