你發起的SQL實例的連接？除非直接連接到數據庫，否則不會填充GridView。
SQL康恩=新的SQL連接（連接字符串）
您可以致電查詢或更改查詢以改變數據庫中的一行進行測試。如果數據庫發生變化，那麼您已經連接。
可能想嘗試初始化一個新的GridView實例也...
這裏有一個參考......
http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.gridview.gridview.aspx
因此，這裏是從學校的工作。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
DataSet ds = new DataSet();
DataTable dt = new DataTable();
dt.Columns.Add("Project_ID", Type.GetType("System.Int32"));
dt.Columns.Add("ProjectName", Type.GetType("System.String"));
DataSet dsProd = new DataSet();
DataTable dtProd = new DataTable();
dtProd.Columns.Add("Product_ID", Type.GetType("System.Int32"));
dtProd.Columns.Add("Product_Name", Type.GetType("System.String"));
SqlConnection conn = new SqlConnection();
conn.ConnectionString = @"Data Source=YAZEED-PC\YAZEED;Initial Catalog=ITS364_Project;Integrated Security=True";
String strSQL = "Select Project_ID,ProjectName from project";
SqlCommand command = new SqlCommand();
SqlDataReader dr;
try
{
conn.Open();
command.Connection = conn;
command.CommandText = strSQL;
dr = command.ExecuteReader();
while (dr.Read())
{
DataRow drr = dt.NewRow();
drr[0] = dr[0];
drr[1] = dr[1];
dt.Rows.Add(drr);
}
ds.Tables.Add(dt);
ddProj.DataValueField = "ProjectName";
ddProj.DataTextField = "Project_ID";
ddProj.DataSource = ds.Tables[0].DefaultView;
ddProj.DataBind();
txtProjName.Text = Convert.ToString(ddProj.SelectedItem.Value);
}
finally
{
conn.Close();
}
string strr = "Select Product_ID, Product_Name from Products";
try
{
conn.Open();
command.Connection = conn;
command.CommandText = strr;
dr = command.ExecuteReader();
while (dr.Read())
{
DataRow drr = dtProd.NewRow();
drr[0] = dr[0];
drr[1] = dr[1];
dtProd.Rows.Add(drr);
}
dsProd.Tables.Add(dtProd);
ddProd.DataValueField = "Product_ID";
ddProd.DataTextField = "Product_Name";
ddProd.DataSource = dsProd.Tables[0].DefaultView;
ddProd.DataBind();
if (ddProd.SelectedIndex != -1)
{
txtProdQuantity.Text = getQuan(Convert.ToInt32(ddProd.SelectedValue));
fillQtyCombo();
}
}
finally
{
conn.Close();
}
}
}
protected string getQuan(int val)
{
string str;
SqlConnection conn = new SqlConnection();
conn.ConnectionString = @"Data Source=YAZEED-PC\YAZEED;Initial Catalog=ITS364_Project;Integrated Security=True";
conn.Open();
String strSQL = "Select Product_Qty from Products where Product_ID = " + val + "";
SqlCommand command = new SqlCommand();
command.Connection = conn;
command.CommandText = strSQL;
str = Convert.ToString(command.ExecuteScalar());
return str;
}
protected void btnAssignProducts_Click(object sender, EventArgs e)
{
if (txtTaskName.Text == string.Empty)
{
msg.Text = "";
this.error.Text = "Please enter Task Name";
}
else if (ddProj.SelectedIndex == -1)
{
msg.Text = "";
this.error.Text = "Please Select Project";
}
else if (ddProd.SelectedIndex == -1)
{
msg.Text = "";
this.error.Text = "Please select Product";
}
else if (Convert.ToInt32(ddProdQuantity.SelectedValue) == 0)
{
msg.Text = "";
this.error.Text = "Please select Product Quantity ";
}
else
{
int rtn = 0;
SqlConnection conn = new SqlConnection();
conn.ConnectionString = @"Data Source=YAZEED-PC\YAZEED;Initial Catalog=ITS364_Project;Integrated Security=True";
conn.Open();
//String strSQL = "INSERT INTO Product_task (Project_ID,Product_ID,Product_Task_desc,Product_Task_Qty) values ("+ddProj.SelectedValue+","+ddProd.SelectedValue+",'"+txtTaskName.Text+"',"+ddProdQuantity.SelectedValue+")";
String strSQL = "INSERT INTO Product_task (Project_ID,Product_ID,Product_Task_desc) values (" + Convert.ToInt32(ddProj.SelectedItem.Text) + "," + ddProd.SelectedValue + ",'" + txtTaskName.Text + "')";
SqlCommand command = new SqlCommand();
command.Connection = conn;
command.CommandText = strSQL;
rtn = Convert.ToInt32(command.ExecuteNonQuery());
if (rtn > 0)
{
error.Text = "";
msg.Text = "Record Saved Successfully";
}
else
{
msg.Text = "";
error.Text = "Record Not saved Successfully, Kindly Try again.";
}
}
}
protected void ddProj_SelectedIndexChanged(object sender, EventArgs e)
{
txtProjName.Text = Convert.ToString(ddProj.SelectedItem.Value);
}
protected void ddProd_SelectedIndexChanged(object sender, EventArgs e)
{
if (ddProd.SelectedIndex != -1)
{
txtProdQuantity.Text = getQuan(Convert.ToInt32(ddProd.SelectedValue));
fillQtyCombo();
}
}
protected void fillQtyCombo()
{
if (ddProd.SelectedIndex != -1)
{
int val = Convert.ToInt32(getQuan(Convert.ToInt32(ddProd.SelectedValue)));
DataSet dsQty = new DataSet();
DataTable dtQty = new DataTable();
dtQty.Columns.Add("ID", Type.GetType("System.Int32"));
dtQty.Columns.Add("VAL", Type.GetType("System.String"));
for (int i = 1; val >= i; i++)
{
DataRow drr = dtQty.NewRow();
drr[0] = i;
drr[1] = i;
dtQty.Rows.Add(drr);
}
dsQty.Tables.Add(dtQty);
ddProdQuantity.DataValueField = "ID";
ddProdQuantity.DataTextField = "VAL";
ddProdQuantity.DataSource = dsQty.Tables[0].DefaultView;
ddProdQuantity.DataBind();
}
}
}
team.aspx下是否沒有文件命名爲team.aspx.designer.cs？有些事情要做的就是右鍵單擊項目，選擇轉換爲Web應用程序（如果可用），否則在設計視圖中打開aspx，並從那裏保存。從標記視圖保存時，我有VS無法生成/更新設計器文件。 –
只是一個測試，我創建了一個具有設計器文件的新文件，但是即使在重新啓動VS之後，我也沒有在該文件中看到有關'GridView1'的任何內容，請重新編譯該項目。這是踢球者。如果我將其作爲Web站點而不是Web應用程序打開，那麼我可以在我的代碼中看到'GridView1'。 – Fylix