无法将参数值从字符串转换为Int32错误

debugcn 发表于 Dev

拉胡尔·苏塔尔（Rahul Sutar）

我的问题是，在将数据提交到数据库时，出现错误

无法将参数值从字符串转换为Int32。

这是我的代码：-

protected void btnSubmit_Click(object sender, EventArgs e)
{
        SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["DefaultCSRConnection"].ConnectionString);
        foreach (GridViewRow row in ImagesGrid.Rows)
        {
            var title = row.FindControl("txtTitle") as TextBox;
            var description = row.FindControl("txtDescription") as TextBox;
            var imageFile = row.FindControl("flUpload") as FileUpload;

            using (SqlCommand cmd = conn.CreateCommand())
            {
                conn.Open();
                SqlCommand cmd1 = new SqlCommand("Insert into tbl_galleries_stack (gallery_id,img_title,img_desc,img_path,IsDefault) values (@gallery_id,@img_title,@img_desc,@img_path,@IsDefault)", conn);
                cmd1.Parameters.Add("@gallery_id", SqlDbType.Int).Value = ddlgallery.SelectedItem.Text;
                cmd1.Parameters.Add("@img_title", SqlDbType.VarChar).Value = title;
                cmd1.Parameters.Add("@img_desc", SqlDbType.VarChar).Value = description;
                cmd1.Parameters.Add("@img_path", SqlDbType.NVarChar).Value = imageFile;
                cmd1.Parameters.Add("@IsDefault", SqlDbType.Bit).Value = Convert.ToInt32(chkDefault.Checked);
                cmd1.ExecuteNonQuery();
                conn.Close();
                ScriptManager.RegisterStartupScript(this, this.GetType(), "alert", "alert('Teachers profile added sucessfully');window.location ='csrgalleriesstack.aspx';", true);
            }

        }
}

我尝试更改Int32为复选框，但无法正常工作。

拉胡尔·苏塔尔（Rahul Sutar）

其实问题不在gallery_id，问题是，我必须filename随路径发送。像这样

cmd1.Parameters.Add("@img_path", SqlDbType.NVarChar).Value = "~/Images/" + imageFile.FileName;

那对我有用。

所以我的最终代码如下：

protected void btnSubmit_Click(object sender, EventArgs e)
    {
        SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["DefaultCSRConnection"].ConnectionString);
        foreach (GridViewRow row in ImagesGrid.Rows)
        {   
            var title = row.FindControl("txtTitle") as TextBox;
            var description = row.FindControl("txtDescription") as TextBox;
            var imageFile = row.FindControl("flUpload") as FileUpload;
            var chkDefault = row.FindControl("chkDefault") as CheckBox;
            using (SqlCommand cmd = conn.CreateCommand())
            {
                conn.Open();
                SqlCommand cmd1 = new SqlCommand("Insert into tbl_galleries_stack (gallery_id,img_title,img_desc,img_path,isDefault) values (@gallery_id,@img_title,@img_desc,@img_path,@isDefault)", conn);
                cmd1.Parameters.Add("@gallery_id", SqlDbType.Int).Value = Convert.ToInt32(ddlgallery.SelectedValue);
                cmd1.Parameters.Add("@img_title", SqlDbType.NVarChar).Value = title.Text;
                cmd1.Parameters.Add("@img_desc", SqlDbType.NVarChar).Value = description.Text;
                if (imageFile.HasFile)
                {
                    imageFile.SaveAs(Server.MapPath("~/GalleryImages/") + imageFile.FileName);
                    cmd1.Parameters.Add("@img_path", SqlDbType.NVarChar).Value = "~/GalleryImages/" + imageFile.FileName;
                }
                cmd1.Parameters.Add("@IsDefault", SqlDbType.Bit).Value = chkDefault.Checked;
                cmd1.ExecuteNonQuery();
                conn.Close();
                ScriptManager.RegisterStartupScript(this, this.GetType(), "alert", "alert('Teachers profile added sucessfully');window.location ='csrgalleriesstack.aspx';", true);
            }

        }
    }