Hi I was wandering if someone could help me with a problem Im having with my code behind for my submit buttons. What I did was create an html form in Dreamweaver and I created the code behind in Visual Studio 2005 to work with it. I have created a couple of applications in the past like this to work with a couple of other webpages I have but without the submit buttons being used this way and they work fine. Now I have 3 different html pages with the same thing, 2 forms and a submit button with the text "Download" for each one but has a different "ID". All the buttons are calling the same code behind. In the code behind, I want to have it distinguish which button was clicked by the "ID". I created a dummy in Visual Studio on the .aspx page with the buttons and it works but when I use the html page for it, and delete the info on the .aspx page, it wont post back to the html. I tried a couple of different ways to get the page_load event to recognize the html form, but been having no luck. Here is one of the codes I am trying to use, and I was wandering if someone could help me figure out what I am doing wrong.
The html pages buttons names and the buttons in visual studio are the exact same.
____________________________________________________________
This is the second way I tried it and no luck with this one.
______________________________________________________
This is my last way I have tried, but it keeps telling me "The event System.Web.UI.WebControls.Button.Click can only appear on the left hand side of += or -=".
I hope someone will be able to help me. Thanks
The html pages buttons names and the buttons in visual studio are the exact same.
C#:
protected void Page_Load(object sender, EventArgs e)
{
btn1.Click += new System.EventHandler(this.Download);
btn2.Click += new System.EventHandler(this.Download);
btn3.Click += new System.EventHandler(this.Download);
btn4.Click += new System.EventHandler(this.Download);
btn5.Click += new System.EventHandler(this.Download);
btn6.Click += new System.EventHandler(this.Download);
btn7.Click += new System.EventHandler(this.Download);
btn8.Click += new System.EventHandler(this.Download);
}
protected void Download(object sender, System.EventArgs e)
{
switch (((Button)sender).OnClientClick)
{
case "btn1":
//code for btn1.
//code to updateDataBase
break;
case "btn2":
//code for btn2.
//code to updateDataBase
break;
case "btn3":
//code for btn3
//code to updateDataBase
break;
case "btn4":
//code for btn4
//code to updateDataBase
break;
case "btn5":
//code for btn5
//code to updateDataBase
break;
case "btn6":
//code for btn6
//code to updateDataBase
break;
case "btn7":
//code for btn7
//code to updateDataBase
break;
case "btn8":
//code for btn8
//code to updateDataBase
break;
}
lblStatus.Text = dlID.ToString();
}
private void UpdateDataBase(object sender)
{
try
{
dbConn.ConnectionString = //code to access mssql database
dbConn.Open();
dbCommand.Connection = dbConn;
dbCommand.CommandText = "SELECT * FROM table WHERE column=" + btnClicked + "";
dbReader = dbCommand.ExecuteReader();
if (dbReader.Read())
{
if (btnClicked == dbReader["column"].ToString())
{
dlID = Convert.ToInt32(dbReader["column"]);
dlID++;
dbConn.Close();
try
{
dbConn.ConnectionString = //code to access mssql database
dbConn.Open();
dbCommand.Connection = dbConn;
dbCommand.CommandText = "UPDATE table SET acolumn= " + dlID + " WHERE acolumn = " + btnClicked + " ";
dbReader = dbCommand.ExecuteReader();
lblStatus.Text = dlID.ToString();
}
catch (Exception ex)
{
Response.Write("Error: " + ex.Message);
}
}
}
}
catch (Exception ex)
{
Response.Write("Error: " + ex.Message);
}
finally
{
dbConn.Close();
}
}This is the second way I tried it and no luck with this one.
C#:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
}
else
{
lblStatus.Text = dlID.ToString();
}
}
protected void btn1_Click(object sender, EventArgs e)
{
code for btn1
}
protected void btn2_Click(object sender, EventArgs e)
{
code for btn2
}
protected void btn3_Click(object sender, EventArgs e)
{
code for btn3
}
protected void btn4_Click(object sender, EventArgs e)
{
code for btn4
}
protected void btn5_Click(object sender, EventArgs e)
{
code for btn5
}
protected void btn6_Click(object sender, EventArgs e)
{
code for btn6
}
protected void btn7_Click(object sender, EventArgs e)
{
code for btn7
}
protected void btn8_Click(object sender, EventArgs e)
{
code for btn8
}
private void UpdateDataBase(object sender)
{
try
{
dbConn.ConnectionString = //code to access mssql database
dbConn.Open();
dbCommand.Connection = dbConn;
dbCommand.CommandText = "SELECT * FROM table WHERE column=" + btnClicked + "";
dbReader = dbCommand.ExecuteReader();
if (dbReader.Read())
{
if (btnClicked == dbReader["column"].ToString())
{
dlID = Convert.ToInt32(dbReader["column"]);
dlID++;
dbConn.Close();
try
{
dbConn.ConnectionString = //code to access mssql database
dbConn.Open();
dbCommand.Connection = dbConn;
dbCommand.CommandText = "UPDATE table SET acolumn= " + dlID + " WHERE acolumn = " + btnClicked + " ";
dbReader = dbCommand.ExecuteReader();
lblStatus.Text = dlID.ToString();
}
catch (Exception ex)
{
Response.Write("Error: " + ex.Message);
}
}
}
}
catch (Exception ex)
{
Response.Write("Error: " + ex.Message);
}
finally
{
dbConn.Close();
}
}This is my last way I have tried, but it keeps telling me "The event System.Web.UI.WebControls.Button.Click can only appear on the left hand side of += or -=".
C#:
protected void Page_Load(object sender, EventArgs e)
{
if (btn1.Click = true)
{
code for btn1
}
else if (btn2.Click = true)
{
code for btn2
}
else if (btn3.Click = true)
{
code for btn3
}
else if (btn4.Click = true)
{
code for btn4
}
else if (btn5.Click = true)
{
code for btn5
}
else if (btn6.Click = true)
{
code for btn6
}
else if (btn7.Click = true)
{
code for btn7
}
else if (btn8.Click = true)
{
code for btn8
}
}
private void UpdateDataBase(object sender)
{
try
{
dbConn.ConnectionString = //code to access mssql database
dbConn.Open();
dbCommand.Connection = dbConn;
dbCommand.CommandText = "SELECT * FROM table WHERE column=" + btnClicked + "";
dbReader = dbCommand.ExecuteReader();
if (dbReader.Read())
{
if (btnClicked == dbReader["column"].ToString())
{
dlID = Convert.ToInt32(dbReader["column"]);
dlID++;
dbConn.Close();
try
{
dbConn.ConnectionString = //code to access mssql database
dbConn.Open();
dbCommand.Connection = dbConn;
dbCommand.CommandText = "UPDATE table SET acolumn= " + dlID + " WHERE acolumn = " + btnClicked + " ";
dbReader = dbCommand.ExecuteReader();
lblStatus.Text = dlID.ToString();
}
catch (Exception ex)
{
Response.Write("Error: " + ex.Message);
}
}
}
}
catch (Exception ex)
{
Response.Write("Error: " + ex.Message);
}
finally
{
dbConn.Close();
}
}
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